Guernsey Wrench Co.

Guernsey Wrench Co. (Lawrence, MA) - Appears to have been formed ca. 1911 to produce the Guernsey monkey wrench, and defunct by ca. 1914. 

Charles C. Guernsey - Patent #978,151 - Monkey Wrench - Assigned 1/2 to Frank O. Libbey

  • Guernsey
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