2017-19-5B (Double Square)

2017-19-5B (Double Square) image

A metal double square with sliding level attached. Object sits in a red cardboard box with a lable on its front that reads "No. 13, 6IN.1only". The square has "The L.S. Starrett co, Athol, Mass., U.S.A. Hardened No.4GRAD" etched into one side. 

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Institution