Vtg Staedtler Mars Engineer 12" Triangular Scale Ruler 987 18-34 Japan

Staedtler-Mars 987 18-34 Engineer Triangular 3 Sided Ruler Colors Japan

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

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

STAEDTLER Mars 987 18-34 Engineer Scale Draft Ruler Japan

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

Staedtler Mars 987‑18‑31 Architect Triangular Scale Ruler – Made in Japan