DB Cooper 12 Posted April 22, 2022 (edited) I read up on regulating and regulated my cheap Coke GMT Master with crappy modified 2813 movement and got it to -1 second per day on timegrapher app and in real life after 24 hours. So I tried to regulate my BP Batman GMT Master with 3804 movement. It was around +7 seconds per day and I got it down to +3 seconds per day. I tried to regulate it one more time to see if I could get it to zero. I slipped off the lever and poked something and it stopped running. I thought I broke the hairspring and removed the stem and as soon as I removed the stem it started working. Then I couldn't reinsert the stem. It goes in and turns the GMT hand forward and the hour and minute hands backwards and won't lock in. Any ideas what I did there and can I fix it? Edited April 22, 2022 by DB Cooper Share this post Link to post Share on other sites
HorFan 482 Posted April 30, 2022 Don’t know what you poked, but it sounds like the keyless works is now screwed. It can be reset ( in theory). I would rather have a root-canal than work on a 3804b keyless. 1 Share this post Link to post Share on other sites
NCRich 13,744 Posted April 30, 2022 My favorite keyless to reset. No telling what you did with the poke but the keyless is screwed. 3 Share this post Link to post Share on other sites
semperfi55 4,707 Posted May 1, 2022 1 hour ago, NCRich said: My favorite keyless to reset. No telling what you did with the poke but the keyless is screwed. Don’t think I have ever successfully reset a 3804b keyless. The movement is perpetually on my eBay watchlist. Replacement is always one click away 1 Share this post Link to post Share on other sites
fatarms 7,759 Posted May 1, 2022 https://www.watchuseek.com/threads/dg3804b-keyless-works-stem-repair.1684826/ Share this post Link to post Share on other sites
Clinical Trial 12 Posted May 1, 2022 3 hours ago, HorFan said: Don’t know what you poked Maybe some answers here ?? Share this post Link to post Share on other sites
tribefan 6,768 Posted May 3, 2022 On 30/04/2022 at 21:22, fatarms said: https://www.watchuseek.com/threads/dg3804b-keyless-works-stem-repair.1684826/ Thanks for that! I now know I will never ever take the caseback off a GMT. Share this post Link to post Share on other sites
