Decimal Hardness Conversion Table. with Sleeve Pocket Holder. Size Approx. A rare find from my family estate. Great condition considering the age. See the photos for more detail and appearance. Age approx.
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Vintage FIRTHITE FIRTH STERLING a Teledyne Co. Mat’l Cutting Calculator
Various Material speed and feed Cutting Calculator. Size Approx. 8″ x 3 1/2″. A rare find from my family estate. Great condition considering the age. See the photos for more detail and appearance.