Staedtler Mars Architect Scale Ruler 987 19-31 Triangular Drafting Scale Japan

VTG Master (Pacific Arc) Ruler No. 95120 SCALE Drafting 3 Sided RULER Japan

Pacific Arc Architect Ruler 95120 JAPAN Drafting Scale Triangle Trianguler Ruler

Vintage Dietzgen 11626 11636 Triangular Architect Engineer Scale Rulers USA 12in

Vintage Gramercy 530 Architect Triangular Scale Drafting Ruler West Germany

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

Pacific Arc Architect Ruler 92121 JAPAN Drafting Scale Triangle Trianguler Ruler

Pacific Arc Architect Scale Drafting Triangular Ruler Plastic 92121