STAEDTLER-MARS 987 18-31 Architect Engineering Scale Triangle Drafting Ruler 12"

VTG Staedtler Mars 987 18-31 Trianglular Scale Ruler Drafting Architect Engineer

#K) Staedtler Mars 987 18-31 Architect Scale - 12 Inches - Made in Japan

Alvin 3 Sided Engineer Scale No 119 PC Triangular Drafting Ruler W-Germany

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

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

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

Staedtler-Mars 961 93-31 Architect Triangular Scale Japan