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

Vintage Staedtler Mars 12" Triangular Metric Ruler Scale White 987 18-34 JAPAN

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

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

Staedtler-Mars 12” Triangular Scale Ruler 987 18-34 Engineer Germany Color Bars

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

Vtg 12” Staedtler Mars 561 70-3 scale Drafting Architects Scale Ruler Japan

Staedtler Mars 987 18-31 Architect Triangular Scale Ruler 12" Made in Germany