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What is this used for ?????
- Thread starter TEACLOCKS
- Start date
I think it is used to determine the diameter of a watch crystal with an accuracy of 1/10th of a millimeter. I think you need to push the rod up and that will allow you to put the crystal between the lower stop and the movable upper stop. The diameter of the crystal can the read on the dial.
Uhralt
Uhralt
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