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UNCOMMON DARLING BROWN & SHARPE CAST IRON FRAME MACHINIST SQUARE

UNCOMMON DARLING BROWN & SHARPE CAST IRON FRAME MACHINIST SQUARE

$55.00 USD

These were patented in 1857. First I have owned. Heavy, solid square with rosewood infill. Stamped in tiny letters D B & S PROV R.I.  Oxidized and a few touches of light pitting as found.