Experience Watchmaking & Jewelry Repair

Use this chart to help find the industry “size” of your pocket watch. Measure the diameter of the movement with a digital gauge. This will only work on ROUND pocket watch movements. – do not use the measurements of the dial or outside case.

Example: if you have a 14.40 mm pocket watch movement, you would call it a 19/0s  pronounced “Ninteen ott” size.

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