C-THRU Metric Ruler M-107 made in usa Centimeters Millimeters

Engineers' Protractor Ruler in Pink: 6-Inch Dual-Scales Ruler for Precision D...

VTG Woodrow 6" Architect Scale Ruler Pocket Arrowhead Conveyors Oshkosh WI USA

Vtg DIETZGEN Architecht Engineer Divided Triangular Scale Ruler Made In USA

Helix #18170 Architect Ruler Tri-Side USA Made 12" | FREE S&H

Vintage Dietzgen 1527 Excello Drafting Engineering Ruler Made In USA

Vintage Post Boxwood 3-Sided Ruler #1301 - Engineering, Drafting ENGINE DIVIDED

ARROW BRAND WOOD 18” RULER ENGINEERING USA RARE VINTAGE MADE IN USA