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

STAEDTLER 12in Engineer Scale Ruler - Triangular Engineering Ruler with 6 Scales

VINTAGE STAEDTLER MARS RULER 987 18-31 ARCHITECT 12' TRIANGULAR SCALE Germany

Staedtler-Mars 987 18-34 Engineer Rule Scale Ruler

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

Ruler Lot Drafting Engineer Rapid Rule Multi-Scale Alvin Staedtler 987 Drawing

New Staedtler 12” scale ruler imperial 98719-31BK made in Germany

Staedtler Architect Triangle Scale Ruler 12" White Drafting Draw School Office