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

Vintage ALLIED 2455 Drafting Machine Scale Ruler 2-4"

Vintage K&E Keuffel & Esser Vemco Drafting Machine Scale Ruler 12” Aluminum

Vintage Universal Drafting 13" Machine Scale Ruler 1 1/2 - 3 & 3/4 - 3/8 in-ft

Vintage Ford Metric Machine Drafting Ruler 1/2mm Scale 300mm Double-Sided Metal

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

Vintage Universal Drafting 19" Machine Scale Ruler 1 1/2 - 3 & 3/4 - 3/8 in-ft

Vintage Bruning Drafting 18-1/2" Machine Scale Ruler Clear Plastic Yard Patent