Keystone Watch Case Co. Case Trademark
Trademark Manufacturer:
Keystone Watch Case Co.Manufacturer Years Active:
1880 - 1956Trademark Markings:
PlanetTrademark Issued:
January 31, 1893Traits:
20 Yr. Gold-FilledGold-Filled
Gold-Filled
Serial Lookup
Choose a manufacturer, enter the serial number, or search by trade name and private label.