Home Forums General Discussion Forum Hamilton 921 problems Reply To: Hamilton 921 problems


    I looked on auction site for a 921 movement so I could refresh my memory a bit. If watch wasn’t holding wind to begin with then either mainspring or clickspring was broken. Now I’m going to guess either the mainspring isn’t seated into barrel properly or the click spring is still broken. Is also possible that tooth off little ratchet wheel that locks mainspring barrel to prevent unwinding is broken. I would take off back and wind a bit. If ratchet wheel doesn’t engage mainspring wheel then problem is either click spring or ratchet wheel. If ratchet isn’t engaging might want to look up a movement and see how ratchet wheel looks like installed. That will show if you have broken part. After you determine ratchet and click spring are fine then look at mainspring and barrel. Center arbor could be in upside down. Mainspring could have come loose from barrel and be slipping inside. Please understand that I am just guessing and am by no means an expert just want to help as sometimes I need help myself.

    Hope I helped a bit,