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

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

Staedtler-Mars 987 19-34 Engineer Engineering Scale Triangle Drafting Ruler 12”

Alvin No. 110P Precise Triangle Architect Drafting Scale Ruler West Germany 12"

Staedtler 987 19-31 Architect Scale Triangle Drafting Ruler 12" Made In Germany

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

Staedtler-Mars 987 19-4 Architect Scale Triangle Drafting Ruler White 12" VTG

12" Aluminum Architect Scale Ruler Laser Etched Triangle Drafting Ruler