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Hey guys and gals. 

I'm servicing an ETA 2770 for use in a Tudor diver project. It was missing part 415 or 420 (I can't remember now) this is the ratchet gear and the crown wheel. 

 

I fitted one from a 2790 movement I have and it fit fine. 

When you wind it, it has a fairly loud click from the click. Way louder than I've heard from any other movement. When auto winding it same click. 

 

Does anyone remember if a 2770 exhibits this noise? Or have I fitted an Ill fitting crown wheel. 

 

Cheers. 

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