This is one of the most useful tools that a watchmaker can have especially if they work with pocket watches. This tool is used to measure pocket watch crystals.
The scale on the left side tells you the base size of the crystal. The scale across the top tells you the specific size of the crystal. A typical measurement will be 19 and 8/16th. This would be for a typical 16 size pocket watch case.
V.T.F. made many wonderful crystal assortments for watchmakers. They were a French company that marketed thousands of crystal assortments in the United States. Most of them came is beautiful oak cabinets.
The scale on the left side tells you the base size of the crystal. The scale across the top tells you the specific size of the crystal. A typical measurement will be 19 and 8/16th. This would be for a typical 16 size pocket watch case.
V.T.F. made many wonderful crystal assortments for watchmakers. They were a French company that marketed thousands of crystal assortments in the United States. Most of them came is beautiful oak cabinets.
