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

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

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

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 60 0512-2 Paragon Drafting Machine Scale Ruler 12” Wood

K&E Paragon Drafting Engineer's Scale - No.1375P-2 - 12in. Long - USA

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