Pittsburgh Automatic Vise & Tool Co.

Pittsburgh, PA - Started ca. 1906 and manufactured John R. Long Patent #742,096 vise.  Here is an article describing the Motorboat & Automobile vise from Industrial Development and Manufacturers' Record

They also manufactured the John R. Long Patent #732,758 Pipe Cutter Vise as described in this July 25, 1907 edition of The Plumbers Trade Journal.

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695 lb. Vise!

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