Pocket Watch Database

J. Boss


Initial Marking: J. Boss

Location: Philadelphia

Years of Operation: 1860-1864

Successor: John G. Stuckert

The J. Boss patents and trademarks were purchased by the Keystone Watch Company and used in production by that company for many decades.

Case Grades

Note: This chart is not intended to be a comprehensive list of grades. Some grades changed traits over time and other grades may not be listed. This chart will be improved as additional information is studied.

Image Name Case Material Gold Content Gurantee Source Catalogs Trademarked
Watch Case Marking for J. Boss Boss Patent: Boss Patent Gold-Filled 20-Year