Staedtler-Mars 987 19-34 Engineer Scale Triangle Drafting Rule 12" USA /inches

Staedtler-Mars 987 19-34 Engineer Scale Triangle Drafting Ruler White 12" VTG

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

STAEDTLER-MARS 987 19-34 Engineer Engineering Scale Triangle Drafting Ruler 12"

Staedtler-Mars 987 18-34 Engineer Scale Triangle Drafting Ruler 12" Japan White

Staedtler-Mars 987 18-34 Engineer Triangle Scale Drafting Ruler 12'' Japan White

Vintage Staedtler-Mars 987 19-34 Engineer Triangle Drafting Ruler 12" Germany

Vintage STAEDTLER-MARS 987 19-34 Engineer Triangular Drafting Scale, Ruler Japan