K&E Keuffel & Esser Co. 18” Drafting Ruler Paragon 1376P - 10

Vintage Keuffel & Esser Paragon Drafting Machine Scale Ruler 6" Wood

Vintage Keuffel & Esser 1375T-1 Paragon Drafting Ruler CLEAR

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

Vintage Railroad Pen Mechanical Drafting Tool Paragon Ruling Pen & Keuffel Esser

Vintage Keuffel & Esser 60 0512-2 Paragon Drafting Machine Scale Ruler 12” Wood

K & E KEUFFEL & ESSER FULL SIZE 1376T-19 DRAFTING MACHINE SCALE RULER 19”

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