VTG K&E Paragon Scale Lot 2 12” Engineering Architect Drafting 1631P 1621P USA

Vintage Architects Scale Drafting Triangular Ruler Engineer 12" Lot of 6

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Vintage DIETZGEN 31626 Triangular Drafting Architects Scale Wood Ruler

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1947 to 1950 Keuffel & Esser Co NY Wood Architects Triangle Scale Drafting Ruler