How do I know what pocket watch I have?

Identifying the Serial Number You want to carefully open the back cover of the pocket watch to find the serial number engraved into the movement. You can then search the Pocket Watch Database or the tables provided by PM Time Service to help you identify your piece.

What do the numbers on a pocket watch mean?

The larger the number preceding the s, the larger the pocket watch. The size is based on the measurement of the movement inside the watch, and not the watch case. A 18s or 16s pocket watch is a common size for a gentlemans watch.