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

Vintage Dietzgen 1509 Scale Ruler Architect Drafting

Vintage DIETZGEN USSTD 1656B Scale Drafting Engineer Ruler Triangular 6 Scales

Vintage Dietzgen 1656 BP Triangular Scale Ruler Architecture Drafting

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

Vintage Keuffel & Esser Paragon 1631P Triangular Scale Drafting Ruler

Wood Dietzgen Triangle Ruler Scale USA Drafting Tool Measure

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