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You might want to look for "thickness gauges". They are used for measuring things like paper or leather etc. They are spring loaded like the feintaster. If you file a small section out of one of the anvils, you can measure balance staffs the same way as you can with a feintaster. They are cheap as well (found these for €10..).
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That is made of gunmetal and it should be left as it is. Those marks on the back if removed will make the back thin. With age that is what happens to gunmetal which is part of the watch history.
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Yep, basically the same principle as for watches with a Swiss lever escapement. The position of the hairspring collet needs to be adjusted/rotated on the balance staff such that the impulse jewel sits perfectly at rest between the banking pins when there’s no power to the pallet fork. On some escapements, there’s an actual beat adjuster, but I’ve never seen one on a clock.
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Nope, only on several Japanese automatic movements. I can't remember if they were all Citizen's. There might have been some Ricoh's or Seiko's with a simular construction as well.
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By RichardHarris123 · Posted
Correct but we only see at X1 magnification. Not visible to the human eye.
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