Internal Tool Co., Carbide Grooving Tool, .187 Minimum Bore, 3/16" Shank Dia., 2-1/2" OAL, Manufacturer's No.: 20-1225, Series 20, Surplus. Purchased grooving tools for a project. Once the project ended, we had a surplus of these tools.
Really old Tap and Die set from at least the 1920s. This has been in our family all these years. Written in pencil on the top is the date of March 31, 1922.
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