US Vietnam & Korean War Chinstrap Types for the M1 Helmet (Part One)

Again, this is a beginners guide and not complete - but to be helpful for first-time buyers or enthusiasts looking for their first M1!
NOTE: The "Korean War" chin strap may simply be a post-WWII type that is missing the ball (they were removable) so just a caution to accuracy there, as the WWII type used no ball and were wire hooks, but this gives you the same principle in the video on how it hooked.