Vintage Universal Drafting 13" And 7" Machine Scale Ruler

K&E Keuffel & Esser Drafting Machine Scale 60 0528 Style 23 18" W. Germany

Vintage Keuffel Esser 1376T-19 Drafting Machine Scale Ruler Arm 18" K&E Acrylic

Vintage Keuffel & Esser 1375P-2 Paragon Drafting Machine Scale Ruler

Vintage ALLIED 2455 Drafting Machine Scale Ruler 2-4"

Vintage Keuffel & Esser 1375P-2 Paragon Drafting Machine Scale Ruler

Vintage Keuffel & Esser 1375P-15 Paragon Drafting Machine Scale Ruler 12” Wood

Vemco 9P-1 12" (12.5") Drafting Machine Scale Ruler