Quartz Watch Accuracy
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- เผยแพร่เมื่อ 10 ก.ย. 2019
- Quartz clocks and watches are everywhere these days. They're accurate, relatively inexpensive and they will run for years without a battery change. At a minimum, even the least accurate quartz clocks are accurate to within less than one minute per month. But some are much better than that. While many of my Casio watches are said to have an accuracy of plus-or-minus 30 seconds per month or better, I had never formally tested them. In this video I test 56 Casio watches (and one Seiko watch), using only their own quartz accuracy. (I turned off the automatic reception on the watches which can otherwise set themselves to atomic time.) At the end of one month I knew how far they had drifted from the real "atomic time" that they all showed at the beginning of the month.
The watches I tested include some from the 1980s and from the 1990s. But most of them are less than 15 years old and the vast majority are less than 5 years old.
I tested 12 of the AWG-M100 watches, each using Casio's Module 5230. The best of them were less than 4 seconds fast at the end of the test and the "worst" were only off by 11-13 seconds.
I tested 7 variations of the WVA-M630 and WVA-M640, using Casio's Module 5161. The best were off by 7 seconds and the "worst" one was off by 15 seconds (just barely within specifications, since Casio says they should be accurate to plus-or-minus 15 seconds per month).
I tested 9 watches from the GWM-500 and GWM-530 model line, using Casio's Module 3405. The best of these was off by just 1.7 seconds after one month! The "worst" was 11.5 seconds off.
I have 6 G-Shock "Squares" with Multiband 6 "atomic time" reception, using Casio's Module 3159. These include different colors of the GW-M5610 along with the more expensive GW-S5600 and the top-of-the-line GW-5000. They performed well. The best ones were each off by only 3.5 seconds at the end of the month-long test and the "worst" was only off by 8 seconds.
I tested the GW-9110 (Module 3217) and it was off by 3.5 seconds. The similar GW-7900 (Module 3193) was off by 5 seconds.
My most basic Casio "Waveceptor" watches are both the resin and metal versions of the WV-58A (Module 3054), the metal and resin version of the WV-200A (Module 3140) and the WV-M60 (Module 3456). Casio says they should all be accurate to within 20 seconds per month. The "worst" of them was still only 13 seconds off. But the very best of them was only off by 1.25 seconds! And it's not even a very expensive watch!
But the most delightful news to report is that the very "cheapest" Casio watches in my collection performed so well. They are variations on the "Casio Royale" watch using Casio's Module 3198 and Module 3299. The "worst" of these was slow by 12 seconds at the end of one month, but still well within the margin of Casio's claims that they would be accurate to within 30 seconds. And the very best of them was the AE-1200WH-1A or the all-black, resin version of the "Casio Royale" using Module 3299. I bought it a few months ago for just $10 at a seasonal sale at Wal-Mart. And, at the end of one month, it was only off by 1.1666667 seconds! That's just 14 seconds per year!
It's important to note that no two watches will perform exactly as well as each other. Even if you had two of the same model watches made in the same factory on the same day by the same people, they aren't likely to be exactly as accurate as each other. But they will probably be within the published specifications, and that's all you should expect. I enjoyed seeing the results of this experiment but, as always, your experience may be different.
The bottom line is that, overall, these watches did very well. - วิทยาศาสตร์และเทคโนโลยี
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Greg Anderson should get more video promotion from youtube. This guy's videos are just excellent on a different level than most popular watch youtubers who may have flashier videos, but who clearly don't know nearly as much as Greg Anderson, and do not sound as interesting when you hear them speak.
18:32 was one of the finest moments in TH-cam history! As an aside, my £9 Casio F91W drifts by about 4s a month, whereas my £7,000 Rolex is +2s a DAY. Naturally, my Casios get lots of wrist-time :) Keep up the good work.
I'm impressed that you are enjoying such opposite ends of the price spectrum!
I remember, in the late 1980s, when I went to large meetings in college (like, at the school's basketball arena) I would start hearing other guys' watches starting to randomly "beep" a couple of minutes before the "top of the hour" all around the room. I daydreamed that if I were ever a speaker at one of those meetings I would take a minute and ask everyone to synchronize their watches (based on a time reference which I would announce) and then I'd hear one, epic, synchronized "beep" in that arena. Of course, I never spoke at one of those big meetings. So the best I can do now is have 57 watches beep together at the 18:32 mark in this video. I'm glad it found its way to someone who could appreciate the achievement!
Greg Anderson - Elmer the Clep Excellent - I cant imagine living life so sloppily as to not have your watch tell the correct time. Any more than a second or so out and I’m NOT happy. MultiBand6 keeps me sane :)
@@GoodTimekeeper In the late 70s/ early 80s our teachers were driven crazy by beeping Casios in class. 😅
It's actually 18:30
Is it not just exemplary quality to see that those 30 year old Casio's are still functioning that well? Wow
Really interesting! I just did a similar test, but with a much smaller sample size, I took 8 quartz watches from different manufacturers and different quartz movements to see how they compared over the month. Your results are probably a lot more scientific than mine. But amazingly I had one watch running a Seiko mecha-quartz VK63 that ran an astounding 0.5 seconds off over the course of the month.
Just the Watch this result dovetails with my suspicion exactly. I just purchased a SEIKO chronograph and was stunned at its accuracy despite not having any gps correction. In the service bulletin printed for technicians, it actually states that the 8t63 movement it more accurate than previous versions, astonishing.
Both vk and vh series from Seiko (sweep second and chronograph movements) are super duper accurate!
Id like to see that test again but all new battery's and either in a constant temp room!
Those Seiko MecaQuartz movements are known to be super accurate and a great value for the money/watch, if you're looking for accuracy, look for those.
I brought a used mossimo watch from ebay more that 10 years ago I changed the battery about a year ago it is still spot on to the second this is not an endorsement of the brand . just fortunate to get the rare one that is so accurate
I really enjoyed your show. I particularly enjoyed the chimes at the end.
The Apple Watch is super accurate too, it’s dead on for the first two days and then it’s dead and inaccurate by 28 days
💀💀💀💀
@Darwin Dustin BOT LOL
It's right for two days but after that it's not even right twice a day.
The Apple watch gets time correction at least once a day. It is not a watch, it is computer
I thought I was losing a lot with my watch so I started looking up videos. Thank God I lost 12 seconds over the past six months. It makes me feel a lot better when I see 15 seconds in a month is normal.
What's not well known is that you can consistently have very accurate time, regardless of the precision of the oscillator, if your quartz analog or digital watch has a "trimmer condenser". They're generally found in older, vintage watches - even many of the cheaper ones. A trimmer condenser changes the frequency coming from the quartz crystal oscillator when its capacity is changed. The frequency is fine-tuned to provide 1 Hz, or one second per second, in frequency dividers in a quartz analog watch. The same principle is involved with an LCD (liquid crystal diode) digital watch. The trimmer condenser looks like a little screw that’s been wired into the circuit board. Typically, turning the screw clockwise speeds it up, and counterclockwise slows it down at roughly about 1 second per day per 1/6 turn of the screw. You should be able to get accuracy to within a couple of seconds per month. What I first like to do is compare the time with another watch, that I know runs a bit fast or slow, then fine-tune the trimmer condenser from there. Then I re-fine-tune the time to an accurate Internet site that shows the time. Keep in mind that, after several years, you may have to tweak the trimmer if the accuracy shifts a bit; but the effects due to aging components is usually negligible. Anyway, when buying a watch, it’s a good idea to remember that not many newer watches have them - even the expensive ones.
Too long didn't read
Thanks . I actually found a trimmer inside the Casio king watch which gained 1 sec/day . I am adjusting it to see how it behaves.
I found the higher end watches of Casio, Seiko, Citizen, and Timex are keeping within 2 to 8 seconds average. There are chronometer rated quartz watches that are calibrated to be within 2 to 3 seconds per month. These are costly. The Casio watch I am wearing now is the GWG-2000. It is keeping to about +3 to +4 seconds per month.
The newer quartz watches are computer calibrated during the manufacturing process, and the corrections are programmed in. The higher end of the older quartz watches have a trimmer capacitor in the oscillator section that can be adjusted. You would need a precision frequency counter with a proximity probe. There are dedicated calibrators for quartz calibrators for this type of adjustment.
Got to admit... These quartz watches are a terrific deal. Very low cost for excellent accuracy. Very dependable over many years. Simply change a low cost battery when it goes weak. On the other hand a decent mechanical watch like an Omega, or a Rolex, or a Hamilton, or an Eterna, can cost many thousands of dollars and keep about 4 to 8 seconds per day average at its best. Then there are the expensive cleanings and maintenance every 4 to 5 years.
Very nice Mr. Anderson... Amazing information shared on quartz accuracy.... Nice to see u rocking the new square😊
I was searching this kind of videos for ages... Thanks🙂
Great video !!! I think it’s pretty funny that the AE1200 (James Bond) look alike kept the closest time sync and it was the least expensive. Thanks again for a fun and interesting watch review video 😎👍
Good to see you back and posting content again.
Ok, this is NOT a quartz watch accuracy video. It's a Cheap Quartz Watch Accuracy video and an excellent Old Cheap Quartz Watch Accuracy video. I would have liked to see a big chart of the results overlaid next to you as you talked over it. Your 30 year old quartz watches were more accurate than just about any certified COSC mechanical movement in a watch under $10,000. I would like to see you show results for the $400-$500 Seiko & Citizen range of watches, they claim 15seconds too. Gave you a thumbs up.
Thank you for doing these videos. I really like them. You also got me into watches beyond belief, and now I have my own collection. Keep being you and thank you again.
You're welcomed. I was fortunate enough to find an audience of folks who enjoy this stuff AND the comments are so kind too! I apologize if I've influenced you to burst your budget on watches! But aren't they fun?
Outstanding vid as always and its nice to see you back. Really look forward to your vids 😊
I’m glad to be back. I’ve had a very demanding but also rewarding “regular job” this summer and now I have a handful of unfinished TH-cam videos that I need to finish ASAP!
Welcome back. I really enjoy your videos. More please!
Thank you. I normally don't ask people to like my videos or to become subscribers. But my viewers have been very, very good to me anyway. And this summer the view numbers have really, really gone up (ironically, during a time when I didn't produce a lot of new TH-cam material)!
I needed that video, thank you! Recently I bought a WV 59 and I like it a lot.
Thanks Greg for all your videos! Knowledge for free, and with a smile, sir! :)
Hearing them happily chirping together was really cute, nice video! No dislikes? Must be a youtube bug, I've never seen that before.
That was very entertaining, specially the chimes as I too have all my watches set to hourly chimes and it always makes me smile when I hear them beep. 😍
Hallo Greg,
I'am very glad to see that there is someone else out there, even more obsessed with accuracy than I am! Just loved this video. I have two multiband Casio's myself and 12 other watches, mechanical and quartz. Thanks for shearing this great experiment with us. Greatings from the Netherlands in Europe.
Thank you for watching. I've found that watch fans who comment on my timekeeping videos are very kind to me. And isn't it great that there are more and more ways to keep accurate time these days? I remember (20 years ago) when things like cell phone networks weren't quite right but, now, even those are really good... which is nice because so many folks are using their cell phones as their primary devices for keeping time.
never cease to amaze us dear old Greg! Good on ya'!🙋
Excellent Channel Greg,keep it up,fascinating stuff.
Thank you. I have a handful of video ideas which are almost ready to produce... so I hope I can keep it up!
Casio Royal supremacy! 1&1/6 of a second, now that is impressive.
How do you measure 1/6 of a second?
@@entertainme7523 Camera frames. At 60 fps, that's 10 frames. 30fps 5 frames. 24fps 4 frames.
thanks so much. watched it and gave it a thumbs up. you are the reason i bought the blue gw-m500f, and the agw- m100. great watches. love them
thanks, so cool. everyone thinks im wierd loving watches and clocks. it would be so easy to shop for me at christmas but they have no clue.
I absolutely love this. Thanks so much for uploading.. Look forward to the rest of your TH-cam catalogue!!
More to come. Thanks for watching!
Fascinating experiment! Really enjoyed this video.
I really enjoyed this video. I have been noticing that many of my Casios were off from each other.
I laughed so much with the last segment with they hourly beeps.
I have a new 2100 Casioak coming. Will do a time accuracy test to see how close it will be to my atomic square G-Shock
The chiming of all those watches reminds me of that scene of the 1960 The Time Machine movie.
LOVE this review
I have that AE-1000W one & that one is the most accurate of all my watches. Actually love to hear the chimes when all the watches are not in sync.
Thanks for the info. Great video.
Thank u LOVE UR SHOWS.
The most accurate quartz watches precision comparison video ever!!
I actually did the same, but only on one watch. It lost 14 seconds in a month which is not bad at all. That's roughly 3 minutes in a year. However temperature is also a factor (and it's cold here in Denmark). Luckily my watch is a radio controlled watch, so it'll always be accurate down to the second. I swear, my OCD is creeping up when my watch did not receive a signal one night haha. Gotta love Casio watches, you get so much for so little compared to other watches.
Edit: Spelling.
OH! Another great video again, love your videos good sir.
I didn't say it in the video but it was a bit of mild torture to know that my 57 watches were all wrong for a whole month! Luckily, I had plenty of "atomic" clocks all around the house.
*_Same here man. Sometimes you can do all that you know how to but I believe YAH’s heavenly host & even the weather serve as impediments to signal reception._*
*_A couple of months ago a few of my Wave Ceptor/Atomics failed to receive during a full moon 🌕 & I believe the day after also._*
@@GoodTimekeeper they were in +
Subscribed, exactly what I wanted to see :)
Your videos are great! I hope you get to share more videos!
I have a few more watch reviews that I need to produce and I'm excited to cover more about "The History of Timekeeping". So please stay tuned!
WOW! That is a LOT of work. Thanks for the fun.
I enjoyed your video. Good content.
Interesting experiment! Enjoyed the video very much!
Impressive collection! ❤️
This was really interesting thank you Greg
this is a really good video. thank you.
Great video sir 👍🏻
i usually set my watches a minute or even two minutes fast and dont worry about nutz on accuracy . my parents who never had expensive watches in the 50's and 60's , set their watches 10 minutes ahead and im sure they did just fine , getting to appointments ect .
Very instructing, thanks, I'm looking forward to an accuracy comparison test on Casio F91w, A168, A700 and the newer A1000 which apparently has the same 3472 module as the A700, thanks and kee up the good work.
Nice presentation.
On the subject of Casio G-Shock, I have a GA2000 which gains 5 seconds per month in its tin. On the wrist it actually loses 2 seconds per month.
My most accurate watch is a Citizen Promaster Diver eco drive BN0085-01E. On wrist + 0.5 and off wrist + 1.5 seconds per month.
I like my watches to be as accurate as possible,but honestly anything better than 10 seconds per month is adequate for me to let it ride for 6 months - at which point they all get reset.
Thank you for the detailed breakdown of a great topic.
Recently I checked my new Casio G‑Shock GW‑M5610U for accuracy. And on the one hand I was pleasantly surprised and on the other hand disappointed. I was pleasantly surprised because in thirty days this watch showed a discrepancy of 2.2 seconds. A very good result. So why was I disappointed as well? Because it wasn't +2.2 seconds, but −2.2 seconds! This is my first G‑Shock I've ever owned that doesn't rush, but lags. And I hate watches that lag. I would rather have a less accurate watch that rushes than a more accurate watch that lags. Psychologically, I am not comfortable with watches that lag simply because with a watch that rushes, I will never be late for anything.
And it would be okay if my region had good Multiband 6 reception, but here these radio signals are not caught. In addition, I work at sea, contracts reach 7‑8 months, and there is rarely access to the Internet, so even in this case I can not always check and adjust the accuracy of the time.
I tested the watch using the Time.is website (it has handy options, including sounding the seconds, which makes it easier to get an accurate check). The watch had been sitting on a shelf all this time without being worn. They say that cooler temperatures and movement can make a quartz watch go a little faster. I hope this is true. Time will tell.
I only have one quartz watch which runs slow so, like you, I was surprised that it didn’t run fast like the others. I suppose you could check it against GPS clocks while you’re at sea. (I’m guessing you use GPS for navigation.) Hmmm.
@@GoodTimekeeper All these navigational benefits of high accuracy are for officers. :) I am not one of them. I'm a service personnel. )
Exactly my thoughts . I too hate a watch that lags .Get yourself that AE-1000W one & that one is the most accurate of all my watches.
I find it necessary to update my post about the accuracy of my GW-M5610U. It's something of a miracle... But in the period of repeated observation somewhere from April to today (end of June) the watch showed much better accuracy. Moreover, hallelujah, it is not lagging, but running ahead by a tiny fraction of a second (not more than a quarter) in a full month of 31 days. Satisfied!
@@Oleg__ Hello friend. In my experience that movement simply wouldn't drift like that all by itself. Have you checked whether the watch is picking up the signal intermitently? Press button D to check last signal date..
It's a fun game to turn on the signal on several watches and hear them slowly drift apart over the days 😁
Very cool experiment. I'm very impressed with the accuracy of the Casio Royale. I've been thinking about getting one. Next time I go to Walmart I hope they have a sale and I'll pick one up.
Interesting video! Thank you!
17:46 I think you just made a techno song😂
I was watching the Good Timekeeper Show with Greg Anderson and was synching my Casio watch with the Junghans App at the same time. To my complete surprise it didn't work. But when I stopped the video and silenced my host, Greg Anderson, my Casio synchronized perfectly.
It turns out I can't watch my favourite watch channel and synchronize my watch at the same time. Such is life and Greg's voice interfers with the signal.
It's a great channel and I have become a big fan. The Gshocks are great. I have two, the GAW 100 as a beater (it's an amazing watch, big but so easy to read) and the GWT b200 for a more stylish look ( nice seconds hand). I am considering the GW 7900 as it looks so cool.
My first GShock was a GW M5610-1B which was fine but I could hardly read the negative display and I had to give it to my son. Now I only consider the positive display because I am too old for the stealth look.
I live in the South of Spain, great for Tough Solar, but the radio reception isn't good. If I leave the watch in the patio overnight there's no problem but in the house it's dodgey.
I am enjoying the Junghans app you recommended because it works and it's so interesting how it functions.
I am left-handed so I bump into everything and I never take my watch off all day, swim, shower or work. As such the Gshocks are perfect for me, being so tough and weightless.
I am surprised Casio hasn't come up with radio reception app for their customers in the Southern hemisphere, I have family in Australia (the Irish emigrate everywhere).
Anyway, thanks for the channel and I'd recommend Gshock watches for anyone.
big thumbs up for the hourly chime at the end...because i really wonderd during the video how that would sound.
That was impressive. Thank you.
Great video - I love when you buy a cheap casio watch and it ends up being super accurate. I bought the re-issue DW-5900 when it came out (I want to say November of 2018) and that watch has been accurate to the second for several months! the beauty you can crack them open and regulate them via trimmer screw if they are off by too much!
So far I haven't been brave enough to open up these watches and try any custom modifications or "tweaking" myself. I admire people who understand the nitty-gritty details better than I do. Maybe I'll try it too someday. Meanwhile, I appreciate your reports.
@@GoodTimekeeper You shouldn't be since they are super simple. Maybe one day buy another one on sale at Walmart and use it to practice. I remember the first few times I took a module completely apart just to reassemble it and be left with one or two miniature springs - now I know to keep an eye open for them, but to adjust the timekeeping you don't even need to go that far - all you need to do is take the caseback and rubber caseback cushion off. Keep the great videos coming.
It is really quite amazing that a cheap digital wrist watch can keep time within +/- 15 to 30 seconds a month. That is a level of accuracy of 5.78 - 11.57 ppm ( 1x10^-6) per day. I think the more expensive G-Shock watches are around +/- 7.00 seconds a month ( 2.7 ppm per day).
Wearing a watch can improve the accuracy as when the watch is strapped to your wrist, body heat tends to keep it at a very constant temperature. This applies to mechanical watches as well as the quartz variety.
I like your stuff alot. I have the same g shock as the one you're wearing in the video.
Ash Willis I just got that new watch last week. I can’t wait to do a proper video review, but I may have to wait until next week. Sometimes it takes a while to be as in-depth as I usually am, and with the addition of an iOS app to include in the review... well... it might take all day to shoot and edit that one!
Excuse me Greg, can you please tell me where you got those great watch boxes? Those look really nice. Thanks!
Fascinating to see. I've always suspected that manufacturers would test their crystals before they assemble the watches and have a sorted pile going to different "grades" of watches, so it's fun to see that isn't necessarily the case.
I wonder if the accuracy of the watch affects the accuracy of the timer and stopwatch. Do different watches differ in the accuracy of the timer and stopwatch, not even considering the accuracy of the watch.
Thank you for this kind of work, it had to be difficult. I can add a piece of information though. My first Casio is the last watch you showed, the all-black Casio Royale. The one that was the most accurate. I bought it to swim in the pool because I had no time reference for my training. I have to say that it suffered greatly from that, I found it something like 4 or 5 seconds off after just 2 weeks. I'm totally new to watches, this one is in fact my first one since I was a kid, maybe this kind of error is normal, I don't know.
Great video.
The best Watch channel on TH-cam 👍
It’s good to see you back! Great video as usual. Any news about the USA powering-down their atomic-time transmitter?
It was decided to keep it operating.
Mark Mangus - that is excellent news.
Last year at this time the rumor spread that "time was running out" for the WWV and WWVB radio station and they would be off-the-air at the end of 2018. But there was never an official announcement about it from NIST. I was so busy that I never got around to investigating the rumor very much. I was just happy that, in the end, it was only a rumor. Still, at the start of January, I was anxiously looking at my dozens of watches and dozens of clocks, wondering what would happen. So far so good. But I'm still thinking about buying that iPhone app which is supposed to mimic WWVB in a way that will allow our radio controlled watches and clocks to set themselves even when WWVB isn't available. If I do I'll make a video about it, of course!
@@GoodTimekeeper - Hi mate, great vid btw! If WWV had shut down, could you have boosted your reception to pickup Japan or Europe? It's possible to boost the signal here in Europe if you're outside UK or German transmitter range, for instance Majorca. You attach or rest the metal caseback of the watch to a large-ish metal object like a bicylce or radiator and bingo it works. Big difference in distance mind you in USA. Poss using TV aerial and co-ax plug maybe?
Great to hear you. Appreciate you for looking to be so perfect and error-free. Thank you.
I would be very interested to see you do a video on that watch you have on your wrist in this video. GW B5600 I think it is. Glad to see more videos from you
Whoops, didn’t finish the video before commenting! Looking forward to that one
Yes, that’s my newest watch. I hope to do a video review in the next few days.
Cool video. I've not yet tested my two MB6-equipped Casio watches for built-in accuracy. I'll just assume that my GW-M5610 is +6s like yours. :-) That said, I'd someday like a high-accuracy thermo-compensated quartz just for fun.
Really good job!
The most exact quartz watch is "The Citizen" by Citizen, could be inexact by 1-5 seconds per year. The second best will be a Seiko, the "Grand Seiko" , about 10 seconds a year. No other brand can match them. Third best should be a Bulova.
You make something that could be boring and making it interesting. 👍
I admit I was worried while I was editing this one. "Will it really be interesting when it's finally done?" I'm glad you liked it.
Thanks for the review. Accuracy is the most important feature of a watch. Ideally the error should be less than 10s per year so you only adjust it only when you swap the battery.
Very interesting video.
Depends on temperature. My Mtg runs 1 sec fast during the 6 summer month and 10 sec fast during the 6 winter month.
That is, do I understand correctly that at lower temperatures, watches will run faster? Are there other factors involved? For example, a watch at rest (lying on a shelf), or used in motion on a hand.
Interesting, and fun.
wow, thank you Greg, good to know
"Greg Anderson, which pill, stay in the matrix or see reality?"
"do you have atomic clocks in the real world?"
Thanks for this video.
My old Dad's watch from 1989/1990? is running slow... about 1.4 seconds slow per day. That is about 42 seconds a month. (it's a Casio AD-510)
I have to say that if a watch lacks accuracy, it should best run fast and not slow.
Now I wonder, should it make a difference if I replace the quartz crystal?
I ordered some two bucks fake F91w out of curiosity. After a few weeks, they've drifted several minutes...
dude, you may have forgotten about your atomic clock video part two! I've been waiting for months
eeyyaakk When I posted the “teaser” for that I didn’t realize that my “real job” schedule was going to be so busy. But now things are settling down and I have a bunch of TH-cam projects that I need to finish, including that one!
I recently picked up a G-shock GW6900-1.
The Multi Band 6 had last been able to update four months before I received the watch. In those four months, it only gained eleven seconds. That's less than a tenth of a second a day.
I'm happy with it.
Nice video 👍
I obsessed over accurate time since I was a little kid as well. I differ only in that I haven't kept my watches over the years.
I too use the Emerald Sequoia Time app to set my watches and to verify their accuracy. Utilizing the tenth second display option is handy when checking Bulova Precisionists. The audio signal is really nice when I don’t want to fool with a camera. I have several of the same Casios as you do, so I found this video very interesting. Since the AE-1000 and the more expensive AE-2100 use the 3198 module, I swapped the modules between a within spec, but disappointing AE-2100 with a near perfect AE-1000. I will give away the AE-1000 to someone that doesn’t mind it being a little off. Heck, it is still more accurate than a Rolex.
I think I need to do a little bit of a "Time App Roundup" some time. But the Emerald Sequoia app is so simple and works so well that I haven't really tried out many of the others. And it's free!
ElmertheClep I also recommend the other Emerald Sequoia apps: Emerald Observatory for iPad, Emerald Chronometer HD (for iPad), Emerald Chronometer (for iPhone), Emerald Timestamp and Emerald Geneva (free version of one of the 16 watches included in the Emerald Chronmeter apps).
I wonder if there is an inherent difference in accuracy between analog and digital quartz watches.
None when it comes to "average market" watches. Higher end watches are more accurate on average but nowdays they are all analog.
My orange band casio is also my most accurate ...followed by my timex expedition(t49905)...both I got on clearance ...now I want to repeat your test by disabling my radio watches receive function ...I thought I might be crazy until I found this video...all my alarms go off at 4:20pm
Sound scene is ❤
I have an Orient and a Pagani Design that both use a Seiko VK63 mecaquartz movement. I've had the Pagani Design since September and it hasn't even lost a second yet. I haven't worn the Orient in a while but it had similar performance.
Nice Video - All my Casios run fast also never slow - Strange how that is . .
That's why I love my GW-B5600AR-1 having the BT connection keeps it accurate to the second every day! I couldn't use a regular quartz after having one off these..
Update! Im using a Citizen Eco-drive Promaster and love it!
I've read that the highest accuracy is achieved if you wear them for around 8 hours a day (otherwise: room temperature). I didn't make exact tests but I think my F91W is in the 5s/month range when worn daily but 20s plus when not.
doubt it
Great video! I’m wondering - since quartz oscillations are temperature dependant, it was my understanding that manufacture ratings are based on the watch being worn on a human wrist for a good part of the day, could explain why some of them are so far off? (I’m assuming you didn’t wear them all haha)
Could the variation between the same module be due to the battery age? I wonder if the voltage supplied will differ over time slightly, and this would affect the oscillation frequency. I guess you’d have to rerun the test with brand new batteries to know for sure 😉
The Casio user manuals specifically mention "normal" temperatures as a factor in their accuracy estimates. And, yes, it makes sense that human body temperature would be normal for a watch. And, yes, you're right that most of these watches stayed in the cases during my month-long test. So... hmmm... maybe more testing would be a good idea. Perhaps I could test one watch and then see how it compares to itself (rather than run the test on all of them again).
If a watch was fast when it was new then degraded over time to within a second a month after ten years, could that be a variable that you didn’t take into consideration? We’re all your watches except for the really old ones fairly new? How many were bought new the same day to be tested? What was the average time off for all the watches tested?
Very interesting. Demonstrates that timekeeping accuracy and price are not necessarily related.
pm your phone is for ex 12 . 30h and on watch 12.30 and 31 sec. how can it be inaccuret? it is + 30 sec / mo.?
please explain
What model is the first watch your put your hands on in this video? (the orange strap one) Is it the MWD 100?
That is a version of the AE-1000 as seen in this video... th-cam.com/video/w71-ecJ3nVk/w-d-xo.htmlsi=LsANdYoBvxHj8Aod
@@GoodTimekeeper Thank you!
i apreciate this video...greetings from colombia
Crystal oscillators are temperature-sensitive - the on-wrist temperature is at least 10 degrees C higher than storage temperature which you should take into account when discussing accuracy.
My Casio EFA110D about 22 years old are within 2sec/month in the LCD part, but those analog hands are usually around a minute off after 2-3 months which is strange :)
Recently added two EFA125D are very similar, the spread between them about 1sec after month.
To make the test more accurate, you also should put fresh battery to all those watches.
Just for comparison my Seiko5 automatic from eighties are about 15sec/day..