Wood K&E Keuffel & Esser Triangle Scale Ruler Drafting 12" Length Vintage

Keuffel & Esser Co. “Doric” N8883 Triangular 12" Engineer’s Scale (ca. 1940s)

Vintage Keuffel & Esser Paragon 1631P Triangular Scale Drafting Ruler W/ Case!

Vintage Keuffel & Esser Paragon 1631P Triangular Scale Drafting Ruler

Vintage K&E Keuffel Esser 1665W Drafting Machine Scale Ruler 12"

Vintage Keuffel & Esser Paragon 1631P Triangular Scale Drafting Ruler

KEUFFEL & ESSER DORIC 12" Triangular Scale Drafting Ruler No 56 3836 K&E

Vintage Keuffel & Esser K&E Triangular Architectural Scale Ruler Wood READ