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Guys what screw driver should I use to regulate ETA?


illa

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Hi, Folks

I found all the topics regarding how to adjust timing on swiss ETA movemnts. Recently I got my UPO 45mm from Josh and they are 10 sec + per day. I did opened caseback, but really get stock on little adjusting screw +/-, I tried all my watch screw drivers but couldnt even move it. On the picture I copied from other member screw has deep enough slit so screw driver can grab it. On my watch it looks like little punched notch.

Please advise your expirience on this matter, thanks

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