Another jewel altering adventure. The Nachtigall movement i am working on had an oval shaped roller jewel which i was breaking during repivoting. Yes, i should have removed the roller table but dont have the removing tool yet. It was no problem until the whole thing flown away from the pinion polishing tool. Used that for the first time and didnt hold the polishing file securely.  Back to the topic. I have measured/calculated the hole dimensions in the roller table on a microscope image. Lu
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