Vintage 12" STAEDTLER MARS 987 19-31 Triangular Drafting Architects Scale Ruler

Vintage 12" STAEDTLER MARS 987 19-34 Triangular Drafting Architects Scale Ruler

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

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

Staedtler® Triangular Scale Plastic Architects Ruler, 12", White

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

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

Vintage Staedtler Triangular Scale Drafting Ruler 987-19-31 Architect 12" Japan