Triangular Ruler STAEDTLER-MARS 987 19-31 ARCHITECT Ruler Plastic Japan

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

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Pickett 234-E Architecture Scale Ruler w/Case Japan Drafting Engineering Vintage

Vintage MARUZEN No.760 Drafting Set Pre CAD Japanese Tools

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

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