Reference Library

Keystone Watch Case Co. Case Trademark

Keystone
Watch Case Co
J. Boss
10k
Gold Filled (Keystone Watch Case Co.)

Trademark Manufacturer:

Keystone Watch Case Co.

Manufacturer Years Active:

1880 - 1956

Trademark Markings:

Keystone
Watch Case Co
J. Boss
10k
Gold Filled

Trademark Issued:

July 18, 1905

Traits:

Gold-Filled

10K Gold-Filled

Other Keystone Watch Case Co. Trademarks