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

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

STAEDTLER-MARS ARCHITECT SCALE TRIANGLE DRAFTING RULER 12"

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

STAEDTLER 987 19-31 Architect Ruler Eng. Scale Triangle Drafting 12" Japan

Staedtler Mars Triangle Drafting Rulers 987 19-31 Architect & 987 19-34 Engineer

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

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