Jon Pohlman

Jon Pohlman

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Vtg Teledyne Firth Sterling Grade Comparison Decimal Equivalents Card 6″ x 3″

Chart Machining Tool for Crater Resistant Grades for Machining Steel & Continuous Chip Materials and For Abrasion Resistant Grades for Machining Cast Iron and Short Chip Materials, 1892. The chart is 6″ x 3″.

Vtg Teledyne Firth Sterling Pocket Protector w Grade Comparison Chart Card

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