10:10 Watch Repair 1 Posted July 22, 2014 So, if he can stop the chronograph when the center second is for instance @4 than it means it is an extra part? Otherwise he couldn't stop, correct? Almost, the chrono will stop because the oscillating pinion is disengaged, but it won't lock. Run the chrono, stop it, then shake the watch and see if the center seconds hand moves. Share this post Link to post Share on other sites
Left Coast Guy 24 Posted July 22, 2014 Also, I'm not 100% sure it means there is a screw loose. I think it may attach to a fixed knob on the movement baseplate. Share this post Link to post Share on other sites
10:10 Watch Repair 1 Posted July 22, 2014 Also, I'm not 100% sure it means there is a screw loose. I think it may attach to a fixed knob on the movement baseplate. You don't think the lock is held in place by a screw? I can assure you it is. Share this post Link to post Share on other sites
