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Eta never made a watch with seperate safety rollers to my knowledge, those were more common turn of the last century up to the 40s maybe at JLC and other makers doing their own escapements.

Nucejoe- if the hole drifts you can see it either with a measuring microscope or jig borer or in a faceplate, centering on the corresponding hole and comparing. All require a certain amount of equipment. Ckelly, your method of measuring bores is an established one though not ultra accurate. If you want I'll do your bushing and try to get some decent pics of the process just for educational purposes, it's a pretty quick job but you'd have to ship to Switzerland..

Hi Joe, If I had to make a quick guess at the id of something I would try to use something with a know od. Say to estimate the id of a jewel I might use a know sfaft, if I didn't have that I might take a smoothing broach and mearsure the od of that. Say open my caliper to.5 and insert broach until the broach stopped. Them mark the broach at that point. Probably not very scientific but would get me pretty close. Yes we live out in the country. As a joke I might say we are about 10 miles west of Nebo. My hometown has two stop lights and one exit on the interstate 40. We are actually about 30 miles east of Asheville. The bear is still around. He tore down my wifes bird feeders. You can look out a back window in our house about everyday and see wild turkey. Yesterday there were 4 deer out back. We also saw a bobcat once. Thanks,

Until I get my new scope I'm struggling to see close up. When it arrives I'll have a good look. I'm partially deaf as well so can't hear it but mrs eezy says it sounds like it's on steroids