Rare Vtg K&E Keuffel & Esser Co. 18" Drafting Ruler Paragon 1376P-22 Full & Half

K&E Keuffel & Esser Paragon 1375P-23 Drafting Machine Scale 12”

Keuffel & Esser Triangular 12” K&E Drafting Scale Ruler 56 3648 Paragon Germany

Vintage KEUFFEL & ESSER K+E 12" Wooden Metric Scale Drafting Ruler

VTG Keuffel & Esser K&E 8893 12” Drafting Triangular Scale Ruler Wooden

Vintage Keuffel & Esser Paragon 1631P Triangular Scale Drafting Ruler

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

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