i have a 6138 (heritage from my father) and i always have the chrono stopped, worrying of maybe wearing out the gears or whatever. thank you very much for this video, it will be running full from now on :)
+Spencer Klein Hi Mr. Spencer. I just bought my new Seiko Bullhead and lovin wearing it. My question is, too make sure the chronograph always in good condition, is it better to leave it stop or keep it running? because on your video you suggest to keep it running. I just want a detail explanation about that coz this is the first time i'm having this vintage chronograph watch. Thanks in advance
I just found a very nice 6139 in the street, interested then i left. But i surprised with the price tag on ebay, streetseller put a price for about $85. I better come back tomorrow then.
Thanks for the info. I have the Seiko 6138 and 6139. I also have 4 Citizen Chronographs from the 70s with the 8110A movement. Does this also apply? I think they have a vertical clutch as well. Thanks in advance
Excellent description! I have a Seiko 7A28 7120 that forms part of a Uk MoD Gen 1(1983) chronograph. Do these issues (leaving the chrono running and the reset issue) affect these watches? Should this model of watch be left running or kept stopped. I was issued this watch by the Royal Navy in the 1980s and want to ensure the watch isn’t damaged TIA Russ
Mirewood, I'm sorry I still can't see your comments and I have no idea why. About getting a watch pressure-tested - if the watch is new, there shouldn't be any reason to. But the thing with pressure testing is that it is more than just having a tester and dunking the watch in water. There is a process for doing it correctly, to make sure that not only water is being excluded, but atmospheric moisture as well. One has to test for condensation inside the watch, not just fluid water getting past the seals. Yet another factor is that if a shop certifies a watch for immersion, they have to have insurance set up to cover that promise if the watch seals fail and the watch is destroyed. So, tools, technology, correct procedures & parts, and legal liability coverage.
I have a Bullhead 6138-0040 that was recently serviced, i wantd to ask you: if i wear it everyday and keep the chrono always running, how long will it take before all the oils runs out and i need to service it back? Oils and the gears will consume faster if the chrono always runs?
Hi Spencer, you talk about the danger being when the chrono hand is close to the 30 second mark - does the hand always take the shortest path back to the 12 o'clock position, or does it go counter-clockwise?
In response to Mirewood, I can't see your comment here for some reason. Anyway, a new Monster (or any new Seiko dive watch or a watch with serious resistance) is good for five years with new seals. If you're going into water often, then the rule of thumb is to have the seals checked every year. I'm talking if you're a diver etc.
Hello...thankful and very useful...I have a couple of questions because I just picked up a Pogue after a long search and while it starts up quickly I doesn’t keep working long when I do set it down...I can wear it all day and take a long walk with it but it always stops running at night after 5 -7 hours and once this week it stopped in the middle of the day...any idea or suggestions? Thanks much
Hi Spencer. Thank you very much for this insight. Love the chrono reset reminder/suggestion. In the case of the speedmaster moonwatch and the speedmaster first omega in space, would keeping it stopped be the best way as well? Thanks once again.
Mr Klein, your videos have caused there to be a Bellmatic on my wrist instead of my pre-ceramic Sub, and have me hunting for a 7a28 6000/9 and a 7a38 7020/9! May I ask whether keeping the chronograph constantly running on those quartz movements is also advised? I'm not au fait with the clutch mechanism used and what implications that has for those two (when I finally get my hands on them!). Also, for the Bellmatic (4006-6021) is it best to keep the alarm spring fully wound, or only wind it just before setting it i.e.
I have a 7A38-7029 in my projects drawers, waiting on a day when I have time to restore it. This video does not apply to quartz watches. Totally different beasts.
Hi Spencer, Thank you for the detailed explanation. I just got the 6138-0040 and likewise as per your video. I kept the chrono running. However, the chrono stops approx after 10hours. Both the hands of the subdials stop at the 10oclock position. The second hand stops at the 18second position. The hour and minute hand is still running fine. My question is will the second hands and the hands on the subdial keeps running despite leaving the chrono running?
Great vid . Does this mean when regulating does that mean the chronograph should be running? Also I take it that having the chrono running while setting time will not cause any issue?
Hello Spencer, I just picked up a good condition 6139... but when it was delivered.... it might of gotten knocked about because when i went to open the package, I noticed the 30 min chrono counter hand fell off into the dial of the watch, now it's just floating around....... is that bad news? will the repair cost more than the watch itself? Thank you for the excellent video's and work you do! regards, Jason
jjlwis HI, it won't cost more than the watch is worth. To replace that hand properly requires that the winding bridge / weight etc come off, that the right movement holder be used to hold the movement, and the tube on the hand be in good condition. The hand is a two-part thing - the flat part of the hand and the tube it sits on. This tube mates with the pinion of the minute-counter wheel, and if it has stretched out or loosened up then it won't hold. That's sort of your worst case scenario, as long as the minute-counter pinion itself is intact and hasn't broken off.
Hello Spencer, great post! Question: I have a NOS (unworn!) 6139 (-6020) from 1970 incoming. It runs and chrono works well (also resets properly). I assume the chrono has not been engaged in al these years, so continuous pressure on the clutch for 45 years... At this moment, I do not plan on wearing the watch but keeping it as new. What is your advise? Put it on a winder and engage the chrono, or get it running with chrono engaged and let run down?Hope to hear from you!Best
+bor de wolf Was the watch reset to zero? In the end, we can't worry about what happened in the past, only what will happen in the future. If your watch is unserviced, it should be serviced before wearing it for any kind of extended time. It might run OK for a bit but it will be wearing constantly until it is cleaned & lubricated.
hey spencer. thanks for the info! was pondering if i should get one of these iconic movements. quick question - I happen to have a seiko 5717 mono-pusher. should i be keeping that chrono hand running or leave it at rest? thanks!
Is this a problem with alot of mechanical chronos, just older movements, or do Seikos suffer from poor designs? Is a newer Seiko movement like 8R28 or 8R48 likely to have the same issues, or servicability problems like the clutch assembly?
Hi Spencer, Does the Chronograph stop after a certain amount of time? Like the new Seiko quartz watches of today that stop after 60mins, do these things stop as well or just keep going/start over? Great vids by the way.
Miko Michael The chronograph in a quartz watch stops after a time because it is programmed to, and due to the fly-by-wire technology, it can be made to / allowed to stop displaying, but it never stops counting. A mechanical chrono like a 6139 or 6138 will always run if engaged, and continue to run until disengaged or the watch runs down.
Does the same rule apply to the modern Seiko Chronographs like the 8R or the 6S? I have a watch with the 8R which I keep the Chronograph running because Im not sure.
that's a custom rig I made, using NOS '70s Stelux H-links. I had to get two of them to build one bracelet, as the links closest to the lugs were too wide for the case, so they had to go. Then I had to take all the extra removable links to flesh out the length. Lastly, I needed to get a set of custom endlinks that my old friend & business partner, Jonathan Koch, had made for the 6105-811x divers. I needed to modify them to fit that bracelet. It's probably about an hour's work and cost me about $125 I think. I'm not sure these bracelets are even still available. eBay seller "moldymeat" had them last year, still.
Great Video! I will now keep mine running. A quick question, I (based on some bad advice) turned the eccentric screw near the colum pillar wheel to zero my seconds hand. It worked, but now every time i hit flyback both crono hands fly about everywhere. Even when the chrono isnt running, hitting flyback causes the hands to move about. The pushers are clean, making good contact and the tubes of chrono hands aren't split. I cant find anything on it anywhere!
Hi Spencer, What do you recommend for the Seiko 7016 chronograph movements? As you know, the chronograph subdial has two hands. Does everything you say about Seiko chronograph movements in this video apply to the 7016 as well? Thanks!
vhchang It's the same technology as the 613x chronographs. Like them, the 701x chronographs use a chronograph wheel with integrated clutch. Now, that said, the Daini-produced 701x chronos are far more robust in overall design, and I haven't personally seen the same level of constant chrono wheel failure I see in the Suwa-produced 613x's. But that doesn't mean that the same potential weaknesses inherent in the design aren't a factor. Me, I'd keep the chrono running.
Hello! I just bought a 6139-6012 chronograph so i guess with column wheel, i let the chrono run allday long and i can see something quite interesting, the chronograph time is guetting around 5 minutes more per day (when it’s 10 am, the 30 minutes counter is already attaquing the 5th minute marker) do i have to stop the chronograph or always let it run despite that little detail? Thank you!
Hi Spencer I don't wear my 6139s very often and do not keep them on winders, if they are not running should the chrono be engaged? I assume this will relieve the tension described?
***** Hi James. I never disengage the chronograph. Having the chrono running is the default state for a 613x. When I look into my watch box and see my 613x's, I look to see that the sweep hands have stopped at :58 or so as the mainspring finally became too weak to push over the minute-counter wheel. I worry when I see that the sweep hand has stopped somewhere other than :58 - that indicates drag or some other issue that is preventing the watch from running correctly. So, the point is that not only is having the chrono engaged the best state for the watch, it also provides a quick visual check once the movement has run down.
totally different beast. That's a Swiss chrono with a Valjoux movement. The chrono setup and reset mechanisms are entirely different. With those I recommend just leaving the chrono stopped until you need it. Basically, the Rolex is a regular watch with a stopwatch feature. The Seiko is a chronograph where you can turn that feature off to get just straight timekeeping.
Hi Spencer, Thanks for this video. One quick question: Assuming I keep the chrono running all the time, is it safer for the movement to momentarily pause the chrono to advance the quickset date, or is it okay to change the date while chrono is running?
chrono and date are not connected in any way. When you quickset a 6139 or 6138 etc all the action from the crown goes into the calendar side, nothing into the movement side. If you're correcting time, like pulling the crown all the way and moving the hands, that will involve the train side since you're turning the cannon pinion which is a friction-fit onto the center wheel. But even there as long as you set the time forward you should be OK. And for the record, over the years since this video came out I've come to think that the most danger to the chrono wheel is not whether it runs or is stopped, but how the transition between the two is managed. Every time I've seen damage happen personally is when the chronograph gets a hard reset - a hard click, with the main sweep hand far away from 12:00. Puts a lot of force into the reset, which can damage the sweep hand tube, and the chronograph wheel clutch spring. If the reset is hard enough the sweep hand can deform, and if the minute hand is between the starting and finishing point of the reset, can hit the minute hand and chip / damage it. This can also mess up the sweep hand in a few different ways. A really hard reset, maybe done a few times, can also snap the pivot off of the chronograph wheel, which kills it. So, i'd say pick a state (running or not) and mostly stick to that. If you keep it running and want to stop it and reset, I recommend letting the main sweep hand pass just over the 12:00 marker, to like :02 or so. Then stop it there, and then reset it. This minimizes the stress of a reset.
sunset No need. Totally different technology. No chronograph wheel to protect. Running the chrono all the time on a quartz will only drain your battery.
Thanks for this video, short and to the point. I have one question. I have both movements, a bullhead and a helmet. Is cronograph wheel the same part for both movements. If god forbid cronograph wheel fails on my bullhead, is it possible to replace that part from 6139 movement? Thanks in advance.
They use slightly different wheels. 888611 for the bullhead, 888612 for the helmet. The parts will not exchange due to the different pinion lengths. The 6138 is longer to clear the height from the extra plate on the front of the 6138.
Thanks a lot man, this helps a lot. These are great movement, but i em always extra gentle when i handle them. So 888611 for bullhead is my mission. Thanks for info, have a nice day.
Mechanical Chronograph? All Chronos with a horizontal clutch (ETA / Valjoux 7750, Poljot 3133, etc.) should NOT run constantly. Chronos with a vertical clutch (Seiko 6138/9 or Citizen 8110a for example) the Chronograph function can be kept constantly running.
![[GUIDES] SEIKO 6139-6002 "POGUE" Buyer's TIPS / Guide - PART 3 - DIAL etc.](http://i.ytimg.com/vi/d6fM4YPhxuI/mqdefault.jpg)
As a recent buyer of a vintage 6138, this is really useful to know - many thanks.
Glad it was helpful!
It looks more pleasing seeing it run, so nice to know it actually helps keep the movement healthier.
I've just ordered a vintage Seiko speedtimer. I'm sure glad I saw this video before the watch arrives.
i have a 6138 (heritage from my father) and i always have the chrono stopped, worrying of maybe wearing out the gears or whatever. thank you very much for this video, it will be running full from now on :)
Best explanation so far in favor of keeping the Seiko sweep hand running. Nice effort, Mr. Klein!
Hussain Dzan
Thanks, I'm glad it's helpful and that I made sense.
+Spencer Klein Hi Mr. Spencer. I just bought my new Seiko Bullhead and lovin wearing it. My question is, too make sure the chronograph always in good condition, is it better to leave it stop or keep it running? because on your video you suggest to keep it running. I just want a detail explanation about that coz this is the first time i'm having this vintage chronograph watch. Thanks in advance
marmutgokil this is an old comment but he literally just explained it in this 5 min video.
I just found a very nice 6139 in the street, interested then i left. But i surprised with the price tag on ebay, streetseller put a price for about $85. I better come back tomorrow then.
@@marmutgokil He already show u in the video to leave the chronograph hand running n u r asking the same question again 😆
So glad to see this. Wasn’t sure what to do when storing my John Player Special. Thank you!!!
No worries!
Very useful information that can't be said elsewhere👍
Thank you Spencer! I just had a full overhaul on my Seiko 6139-6005 completed yesterday. Good information!
Thanks for the info. I have the Seiko 6138 and 6139. I also have 4 Citizen Chronographs from the 70s with the 8110A movement. Does this also apply? I think they have a vertical clutch as well. Thanks in advance
Thanks Spencer for the great tip. I recently bought both a seiko jumbo and a UFO. I will keep the chrono running
Excellent description!
I have a Seiko 7A28 7120 that forms part of a Uk MoD Gen 1(1983) chronograph.
Do these issues (leaving the chrono running and the reset issue) affect these watches?
Should this model of watch be left running or kept stopped.
I was issued this watch by the Royal Navy in the 1980s and want to ensure the watch isn’t damaged
TIA
Russ
Always good to watch
Thank you so much. This trouble me years since collecting watches.
You're absolutely right!!! Watchmaker here...!
Thank you so much for your kind advise.
Mirewood, I'm sorry I still can't see your comments and I have no idea why. About getting a watch pressure-tested - if the watch is new, there shouldn't be any reason to. But the thing with pressure testing is that it is more than just having a tester and dunking the watch in water. There is a process for doing it correctly, to make sure that not only water is being excluded, but atmospheric moisture as well. One has to test for condensation inside the watch, not just fluid water getting past the seals. Yet another factor is that if a shop certifies a watch for immersion, they have to have insurance set up to cover that promise if the watch seals fail and the watch is destroyed. So, tools, technology, correct procedures & parts, and legal liability coverage.
Thanks for the video. I just learned something valuable.
I have a Bullhead 6138-0040 that was recently serviced, i wantd to ask you: if i wear it everyday and keep the chrono always running, how long will it take before all the oils runs out and i need to service it back?
Oils and the gears will consume faster if the chrono always runs?
Great Video, thanks for sharing your knowledge...
Hi Spencer, you talk about the danger being when the chrono hand is close to the 30 second mark - does the hand always take the shortest path back to the 12 o'clock position, or does it go counter-clockwise?
👍👍👍very useful information, thanks.
thank you!
Verrrry intresting thank you spencer
Does the chrono hand reset in one direction or always the shortest distance? Can I reset from :55?
I thank you. But more importantly, my Seiko Helmet thanks you!
I just got a B01 Breitling based movement on my Tudor Black Bay Chrono. Would you mind commenting on if I should leave the chrono running?
Really interesting video thanks.
In response to Mirewood, I can't see your comment here for some reason. Anyway, a new Monster (or any new Seiko dive watch or a watch with serious resistance) is good for five years with new seals. If you're going into water often, then the rule of thumb is to have the seals checked every year. I'm talking if you're a diver etc.
Does this apply to the 7016 chronograph movements from Seiko Daini?
Hello...thankful and very useful...I have a couple of questions because I just picked up a Pogue after a long search and while it starts up quickly I doesn’t keep working long when I do set it down...I can wear it all day and take a long walk with it but it always stops running at night after 5 -7 hours and once this week it stopped in the middle of the day...any idea or suggestions? Thanks much
It just needs service. Low power reserve is the watch telling us that something is wrong.
Hi Spencer. Thank you very much for this insight. Love the chrono reset reminder/suggestion. In the case of the speedmaster moonwatch and the speedmaster first omega in space, would keeping it stopped be the best way as well? Thanks once again.
Horizontal clutch. Don't let it constantly run.
@@fengxueshanshenmiao Thanks!
Mr Klein, your videos have caused there to be a Bellmatic on my wrist instead of my pre-ceramic Sub, and have me hunting for a 7a28 6000/9 and a 7a38 7020/9! May I ask whether keeping the chronograph constantly running on those quartz movements is also advised? I'm not au fait with the clutch mechanism used and what implications that has for those two (when I finally get my hands on them!).
Also, for the Bellmatic (4006-6021) is it best to keep the alarm spring fully wound, or only wind it just before setting it i.e.
I have a 7A38-7029 in my projects drawers, waiting on a day when I have time to restore it. This video does not apply to quartz watches. Totally different beasts.
Hi Spencer, Thank you for the detailed explanation. I just got the 6138-0040 and likewise as per your video. I kept the chrono running. However, the chrono stops approx after 10hours. Both the hands of the subdials stop at the 10oclock position. The second hand stops at the 18second position. The hour and minute hand is still running fine. My question is will the second hands and the hands on the subdial keeps running despite leaving the chrono running?
Great vid . Does this mean when regulating does that mean the chronograph should be running? Also I take it that having the chrono running while setting time will not cause any issue?
Hello Spencer,
I just picked up a good condition 6139... but when it was delivered.... it might of gotten knocked about because when i went to open the package, I noticed the 30 min chrono counter hand fell off into the dial of the watch, now it's just floating around....... is that bad news? will the repair cost more than the watch itself?
Thank you for the excellent video's and work you do!
regards,
Jason
jjlwis
HI, it won't cost more than the watch is worth. To replace that hand properly requires that the winding bridge / weight etc come off, that the right movement holder be used to hold the movement, and the tube on the hand be in good condition. The hand is a two-part thing - the flat part of the hand and the tube it sits on. This tube mates with the pinion of the minute-counter wheel, and if it has stretched out or loosened up then it won't hold. That's sort of your worst case scenario, as long as the minute-counter pinion itself is intact and hasn't broken off.
Hello Spencer, great post! Question: I have a NOS (unworn!) 6139 (-6020) from 1970 incoming. It runs and chrono works well (also resets properly). I assume the chrono has not been engaged in al these years, so continuous pressure on the clutch for 45 years... At this moment, I do not plan on wearing the watch but keeping it as new. What is your advise? Put it on a winder and engage the chrono, or get it running with chrono engaged and let run down?Hope to hear from you!Best
+bor de wolf
Was the watch reset to zero? In the end, we can't worry about what happened in the past, only what will happen in the future. If your watch is unserviced, it should be serviced before wearing it for any kind of extended time. It might run OK for a bit but it will be wearing constantly until it is cleaned & lubricated.
hey spencer. thanks for the info! was pondering if i should get one of these iconic movements. quick question - I happen to have a seiko 5717 mono-pusher. should i be keeping that chrono hand running or leave it at rest? thanks!
Is this a problem with alot of mechanical chronos, just older movements, or do Seikos suffer from poor designs? Is a newer Seiko movement like 8R28 or 8R48 likely to have the same issues, or servicability problems like the clutch assembly?
Hi Spencer,
Does the Chronograph stop after a certain amount of time? Like the new Seiko quartz watches of today that stop after 60mins, do these things stop as well or just keep going/start over?
Great vids by the way.
Miko Michael
The chronograph in a quartz watch stops after a time because it is programmed to, and due to the fly-by-wire technology, it can be made to / allowed to stop displaying, but it never stops counting.
A mechanical chrono like a 6139 or 6138 will always run if engaged, and continue to run until disengaged or the watch runs down.
Does the same rule apply to the modern Seiko Chronographs like the 8R or the 6S? I have a watch with the 8R which I keep the Chronograph running because Im not sure.
I wouldn't dare to say - everything depends on the reset system, if it is Swiss or old Seiko style.
That looks like an aftermarket bracelet for the 6138. Where can I get one like that so I can save my original?
that's a custom rig I made, using NOS '70s Stelux H-links. I had to get two of them to build one bracelet, as the links closest to the lugs were too wide for the case, so they had to go. Then I had to take all the extra removable links to flesh out the length. Lastly, I needed to get a set of custom endlinks that my old friend & business partner, Jonathan Koch, had made for the 6105-811x divers. I needed to modify them to fit that bracelet. It's probably about an hour's work and cost me about $125 I think. I'm not sure these bracelets are even still available. eBay seller "moldymeat" had them last year, still.
hiya there i am wondering if this would be the case for a venus 188 movement
thanks
Venus Movements should be stopped until needed.
Great Video! I will now keep mine running. A quick question, I (based on some bad advice) turned the eccentric screw near the colum pillar wheel to zero my seconds hand. It worked, but now every time i hit flyback both crono hands fly about everywhere. Even when the chrono isnt running, hitting flyback causes the hands to move about. The pushers are clean, making good contact and the tubes of chrono hands aren't split. I cant find anything on it anywhere!
Hi Spencer,
What do you recommend for the Seiko 7016 chronograph movements? As you know, the chronograph subdial has two hands.
Does everything you say about Seiko chronograph movements in this video apply to the 7016 as well?
Thanks!
vhchang
It's the same technology as the 613x chronographs. Like them, the 701x chronographs use a chronograph wheel with integrated clutch. Now, that said, the Daini-produced 701x chronos are far more robust in overall design, and I haven't personally seen the same level of constant chrono wheel failure I see in the Suwa-produced 613x's. But that doesn't mean that the same potential weaknesses inherent in the design aren't a factor. Me, I'd keep the chrono running.
Do you offer servicing on the 6139? I have one that needs it
Spencer, is it a good idea to have Seiko 7a's quartz running also? Love your channel and thank you for your videos :-)
Apparently no need to - runs a different way.
Hello! I just bought a 6139-6012 chronograph so i guess with column wheel, i let the chrono run allday long and i can see something quite interesting, the chronograph time is guetting around 5 minutes more per day (when it’s 10 am, the 30 minutes counter is already attaquing the 5th minute marker) do i have to stop the chronograph or always let it run despite that little detail? Thank you!
Hi Spencer
I don't wear my 6139s very often and do not keep them on winders, if they are not running should the chrono be engaged? I assume this will relieve the tension described?
*****
Hi James. I never disengage the chronograph. Having the chrono running is the default state for a 613x. When I look into my watch box and see my 613x's, I look to see that the sweep hands have stopped at :58 or so as the mainspring finally became too weak to push over the minute-counter wheel. I worry when I see that the sweep hand has stopped somewhere other than :58 - that indicates drag or some other issue that is preventing the watch from running correctly. So, the point is that not only is having the chrono engaged the best state for the watch, it also provides a quick visual check once the movement has run down.
What about a Rolex Daytona 3130
totally different beast. That's a Swiss chrono with a Valjoux movement. The chrono setup and reset mechanisms are entirely different. With those I recommend just leaving the chrono stopped until you need it. Basically, the Rolex is a regular watch with a stopwatch feature. The Seiko is a chronograph where you can turn that feature off to get just straight timekeeping.
Hi Spencer,
Thanks for this video. One quick question: Assuming I keep the chrono running all the time, is it safer for the movement to momentarily pause the chrono to advance the quickset date, or is it okay to change the date while chrono is running?
chrono and date are not connected in any way. When you quickset a 6139 or 6138 etc all the action from the crown goes into the calendar side, nothing into the movement side. If you're correcting time, like pulling the crown all the way and moving the hands, that will involve the train side since you're turning the cannon pinion which is a friction-fit onto the center wheel. But even there as long as you set the time forward you should be OK.
And for the record, over the years since this video came out I've come to think that the most danger to the chrono wheel is not whether it runs or is stopped, but how the transition between the two is managed. Every time I've seen damage happen personally is when the chronograph gets a hard reset - a hard click, with the main sweep hand far away from 12:00. Puts a lot of force into the reset, which can damage the sweep hand tube, and the chronograph wheel clutch spring. If the reset is hard enough the sweep hand can deform, and if the minute hand is between the starting and finishing point of the reset, can hit the minute hand and chip / damage it. This can also mess up the sweep hand in a few different ways. A really hard reset, maybe done a few times, can also snap the pivot off of the chronograph wheel, which kills it.
So, i'd say pick a state (running or not) and mostly stick to that. If you keep it running and want to stop it and reset, I recommend letting the main sweep hand pass just over the 12:00 marker, to like :02 or so. Then stop it there, and then reset it. This minimizes the stress of a reset.
Would you advised the same practise be applied to a Seiko quartz chronograph?
sunset
No need. Totally different technology. No chronograph wheel to protect. Running the chrono all the time on a quartz will only drain your battery.
Do these rules only apply to these type of chronographs? Or would any also apply to a column wheel as well
The 6138 has a column wheel.
oh I see
Thanks for this video, short and to the point. I have one question. I have both movements, a bullhead and a helmet. Is cronograph wheel the same part for both movements. If god forbid cronograph wheel fails on my bullhead, is it possible to replace that part from 6139 movement? Thanks in advance.
They use slightly different wheels. 888611 for the bullhead, 888612 for the helmet. The parts will not exchange due to the different pinion lengths. The 6138 is longer to clear the height from the extra plate on the front of the 6138.
Thanks a lot man, this helps a lot. These are great movement, but i em always extra gentle when i handle them. So 888611 for bullhead is my mission. Thanks for info, have a nice day.
very helpfull, indeed..
Sehr schöne Uhren!
I need help, how can i tell if i have to keep it running or not?? Please reply
Didn't you watch the video? Keep Seiko mechanical chronographs running.
Spencer Klein i did but i dont have a seiko im asking for another type of watch
Mechanical Chronograph?
All Chronos with a horizontal clutch (ETA / Valjoux 7750, Poljot 3133, etc.) should NOT run constantly.
Chronos with a vertical clutch (Seiko 6138/9 or Citizen 8110a for example) the Chronograph function can be kept constantly running.