The Keystone Watch Case Co.

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Keystone Watch Case Co.
Founded1904; 120 years ago (1904)
FounderTheophilus Zurbrugg

Keystone Watch Case Co. was the name of a conglomerate of watch companies assembled by Theophilus Zurbrugg by 1904.

Keystone purchased the rights to the E. Howard name (a legacy of the Howard Watch Company) in 1902 and sold Keystone-Howard watches.[1]


  1. ^ "Howard Watch Company: History, Serial Numbers & Production Dates". Retrieved 2013-05-30.