NCRich 13,792 Posted December 25, 2017 I had been looking around for a tutorial and found this one on the Knitting Circle. I am assuming this is the best way to freeze the chrono hand on the 23j watches with Chronos. Those movements, from my research, are DG3836P. Available on CousinsUK here: So if you screw it up, you can get a new movement pretty cheap. Here is the post from the knitting circle: Freezing a Center Seconds, 3 & 9 Subdials, for what could be a reliable Center Seconds Daytona. (But non-working chrono, so appearance only) What I found, and it can be done.... CAUTION - Working on this movement requires a similar skill set to working on a 7750. The Auto-Winding assembly was never really meant to be disassembled on this otherwise 'disposable' movement. Pics to explain it all: Now put the winding bridge back on. I'm going to try this soon, @GenTLe is this how you would do it? I've had crap luck putting winding bridges back on 23j watches. So I may well destroy mine in the process but you gets lots of tries to get it right. Share this post Link to post Share on other sites
McGilli 1 Posted December 25, 2017 It says file off 3 teeth - but only 2 teeth were filed off Good luck! Share this post Link to post Share on other sites
Nikosaldente 630 Posted December 26, 2017 Thanks for sharing! I hope it'll work out for you! Share this post Link to post Share on other sites
GenTLe 1,510 Posted December 26, 2017 Never personally did it, but yes I'd do something like that, plus a bit of glue so that the pinion doesn't rotate in case of a rapid wrist movement. A trick to help you to put back the main bridge is to rotate 180° the triangular bit of the click, so that it doesn't push against the reversing gear preventing the bridge to accept the pinions of the gears below. It is the kind of triangular bit kept in place by the second screw from the bottom in the 4th pic. You can then rotate it back in normal position after the bridge has been secured Share this post Link to post Share on other sites
aitcharGMT 0 Posted June 18, 2018 On 2017-12-26 at 06:09, GenTLe said: Never personally did it, but yes I'd do something like that, plus a bit of glue so that the pinion doesn't rotate in case of a rapid wrist movement. A trick to help you to put back the main bridge is to rotate 180° the triangular bit of the click, so that it doesn't push against the reversing gear preventing the bridge to accept the pinions of the gears below. It is the kind of triangular bit kept in place by the second screw from the bottom in the 4th pic. You can then rotate it back in normal position after the bridge has been secured Yes! Thanks for this to both. I just did this to a cheap DH Monaco! Share this post Link to post Share on other sites
gmchris 68 Posted June 18, 2018 Wow. That's alot of effort (and skill) for a 21j cheapie. I think for a Speedie I'd get a quartz version for better subdial spacing - but I'd like to freeze the running seconds @6 subdial. Still impressive work tho 1 Share this post Link to post Share on other sites
splke 4,429 Posted December 9, 2018 thanks @NCRich but that looks like open heart surgery on a flea way beyond my strap changing abilities 1 Share this post Link to post Share on other sites
BIG GRUNDY 6 Posted December 9, 2018 Once again, your dedication to this craft amazes me... or is it the free time on your hands that I'm envious of Share this post Link to post Share on other sites
semperfi55 4,707 Posted December 9, 2018 Oooh this guide is a game-changer, might be applicable to the Royal Oak Perpetual Calendar! Cheers @NCRich Share this post Link to post Share on other sites
splke 4,429 Posted February 14, 2020 anyone on here successfully carry this out ? Share this post Link to post Share on other sites
BadPickle 2,784 Posted February 14, 2020 4 hours ago, splke said: anyone on here successfully carry this out ? not with your reputation sweetie Share this post Link to post Share on other sites
splke 4,429 Posted February 14, 2020 Ssshhhh mouth! I was hoping I'd get a vol to do it for me Share this post Link to post Share on other sites
BadPickle 2,784 Posted February 15, 2020 11 hours ago, splke said: Ssshhhh mouth! I was hoping I'd get a vol to do it for me Share this post Link to post Share on other sites