netniet Posted December 22, 2013 Report Share Posted December 22, 2013 I have a ETA Swiss valjoux 7750 25 jewel movement in my 3717, which I don't wear that often. The issue I have with this movement is when I have wound the watch via the gen crown, and screw the crown back in, it seems to still winding the watch. I can hear the same sound as when I am winding the watch, and it feels the same. What could be wrong? Quote Link to comment Share on other sites More sharing options...
Rolexman Posted December 22, 2013 Report Share Posted December 22, 2013 Stem too short or crown clutch problem. Easy fix. Quote Link to comment Share on other sites More sharing options...
netniet Posted December 22, 2013 Author Report Share Posted December 22, 2013 How can I fix this? Or who? I don't want to destroy the movement with my noob knowledge and skills. Quote Link to comment Share on other sites More sharing options...
mujahid7ia Posted December 25, 2013 Report Share Posted December 25, 2013 Do you mean it winds while screwing the crown back in, or after it is screwed in (i.e. it never screws in completely)? If the former, isn't that how an ETA 7750 normally functions? That seems to be the case on my Sinn 956 Klassik (gen). Quote Link to comment Share on other sites More sharing options...
netniet Posted December 25, 2013 Author Report Share Posted December 25, 2013 Do you mean it winds while screwing the crown back in, or after it is screwed in (i.e. it never screws in completely)? If the former, isn't that how an ETA 7750 normally functions? That seems to be the case on my Sinn 956 Klassik (gen). Yup, it still winds while screwing the crown back in. I rarely wear this watch, and it is currently my only ETA 7750 watch, so I can't remember anymore if its correct behaviour, or not. But to me, it seems wrong (comparing it to my Rollies). Quote Link to comment Share on other sites More sharing options...
Cromag Posted December 25, 2013 Report Share Posted December 25, 2013 A lot of my reps do that. What's the big deal? Quote Link to comment Share on other sites More sharing options...
netniet Posted December 25, 2013 Author Report Share Posted December 25, 2013 A lot of my reps do that. What's the big deal? The movement is the only non gen IWC part of my 3717, the rest is of the watch is all gen. And even its only sitting in my watchbox, I still want it to be working perfectly. Quote Link to comment Share on other sites More sharing options...
SSTEEL Posted December 25, 2013 Report Share Posted December 25, 2013 (edited) You state yours has a genuine crown? I take it the genuine tube was fitted too? Photo of genuine, and rep tubes.. Genuine on the right. (It's my own photo) When you unscrew the crown, it should pop out to the winding position. The crown itself has a spring in it, that enables this. Whilst screwing the crown down, its quite normal to wind the movement whilst doing so. I have a franken, with genuine parts, an IWC 3717 just like yours, and its ETA7750 is a Tissot movement. No problems at all in it doing this. The only issue I had was the Tissot stem was too thick to accept the genuine IWC crown which was quite odd to me, but there's a first time for everything. I managed to fit another ETA 7750 stem to it no problem though. Edited December 25, 2013 by SSTEEL Quote Link to comment Share on other sites More sharing options...
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