The White Heat Treating Company was an industrial metal-treating firm active during the mid-20th century. They specialized in controlled-atmosphere heat treating and furnace brazing, notably contributing as an industrial contractor for projects like the U.S. Army's Corporal Missile program

Caliepr is approx 12in tall closed. Opens to an approx maximum of 19in

it was common practice for such industrial companies to stamp or etch their names onto machine shop tools, shop gauges, or calipers to establish ownership within a large shared production floor or to serve as promotional items given to clients and machinists.

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