STAEDTLER-MARS 987 18-31 Architect Engineering Scale Triangle Drafting Ruler 12"

#K) Staedtler Mars 987 18-31 Architect Scale - 12 Inches - Made in Japan

STAEDTLER-MARS 987 18-31 Architect Eng. Scale Triangle Drafting Ruler 12"

Alvin 3 Sided Engineer Scale No 119 PC Triangular Drafting Ruler W-Germany

Lot Of 4 Vintage Architect's / Engineer's 6" Advertising Scale Rulers, Nice

Fullerton 3725 Triangular Scale Ruler Made in Germany Architect Drafting

Vtg Tacro 4782 Architect 3 Sided Triangular Scale Ruler 12 Scales Drafting F5

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