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

Staedtler Student Engineering Mars Triangular Scale 987 19-34BK White 12" New

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

Vintage Staedtler-Mars 987 Engineer Triangular Scale Ruler Japan 12” Metric Tool

Vintage 12" STAEDTLER MARS 987 19-1 Triangular Drafting Architects Scale Ruler

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