VINTAGE K & E KEUFFEL & ESSER 6" 1630 P PARAGON RULE, DRAFTING SCALE

Vintage 12" PICKETT P-232E-ES Triangular Drafting Architects Scale Ruler

Keuffel & Esser KE 56 3276 METRIC Paragon Drafting Scale 30cm Drafting Ruler

Vintage Keuffel + Esser Triangular Drafting Scale Ruler 56 3656 W/ Case 12”

Vintage Dietzgen 1509 Scale Ruler Architect Drafting

Dietzgen 1661B Triangular Drafting Scale Ruler with Original Box

Wood Dietzgen Triangle Ruler Scale USA Drafting Tool Measure

Keuffel & Esser (K&E) “Paragon” 12"/30 mm Scale W/Case – Model 56-3280 (Germany)