Vintage Pocket Watch Repairs

What are some of the common problems you come across when working on old pocket watch movements?

I'm interested in hearing how people identify old movements, find the right mainsprings, and deal with worn parts like pivots and bushings.

I found this with AI which is also helping learn more about this area in horology.

Movement Identification

The Serial Number Location: Ignore the case number entirely. Look for the serial number stamped directly on the movement plates inside.

• American Movements: Plug the movement serial number and manufacturer name (e.g., Waltham, Elgin, Illinois, Hamilton) into the online Pocket Watch Database. It instantly provides the exact production year, grade, and size (e.g., 18s, 16s, 12s).
• Swiss & European Movements: Often unbranded. Match the shape of the bridges and the unique layout of the winding click-work under the dial using historical reference catalogs like Bestfit or Marshall.