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

Vintage Gramercy 530 Architect Triangular Scale Drafting Ruler West Germany

Fullerton 3725 Triangular Scale Ruler Made in Germany Architect Drafting

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

Aluminum Triangular Architect Ruler w/Laser-Etched Imperial Drafting Scales 12"

Dark Blue Alumicolor Architect's Scale Ruler Triangular Drafting Tool CODE 2030

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

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