KOH-I-NOOR No. 3272 Architect Drafting Triangular Scale 12" Plastic Ruler

Vintage 12" STERLING Triangular Drafting Architects Scale Ruler

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

Staedtler-Mars 987 19-31 Architect Scale Triangle Drafting Ruler White 12" VTG

VTG Koh-I-Noor 3272 Architect Drafting Triang Scale Ruler Plastic 12”

Aluminum Triangular Architect Ruler w/Laser-Etched Imperial Drafting Scales 12"

Fullerton 3725 Triangular Scale Ruler Made in Germany Architect Drafting

Vintage Architect's 12" Triangular Plastic Scale Ruler ~ Made in U.S.A.