2 Vintage Triangle wood 12" rulers for drafting, architecture, engineering

Architectural Scale Ruler 12'' Imperial Architect Scale Aluminum Engineer Draft

12”Architectural Scale Ruler for Blueprints, Architecture Ruler, Architect Ruler

12" Triangular Engineering/Architectural Multi-Scale ruler, Sterling - white

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

Architectural Scale Ruler 12", Aluminum, Blueprint, Engineering, Drafting, Black

VTG Post U.S. Std. 7301 and 7311 Drafting Engineering Triangular Ruler 12" USA

Engineer Scale Ruler 12 Inch Aluminum Laser-Etched Triangular Drafting Tool Blue