VTG Frank A. Colley Boston + Wooden Ruler Triangle 12" Engineering Drafting Tool

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Pickett 235E Architect Triangular Scale Ruler 12" Engineering Drafting Tool

Vtg 6" Pickett 330A Pocket Ruler w/ Leather Case Engineering Drafting

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Pickett 234-E Architecture Scale Ruler w/Case Japan Drafting Engineering Vintage

Pickett 235E Architect Triangular Scale Ruler 12" Engineering Drafting Tool