Vintage Lietz Triangular 3-sided Architect Ruler 2302-S West

Shalipa 12 Architectural Scale Ruler Aluminum, Metric Metal Engineers Triangle Drafting Ruler with Imperial Measurements for Architects, Drawing Ruler for Teachers and Students (Blue) : Office Products

ARTEZA Triangular Architect Scale RULER 3 Sided Aluminum Engineer Drafting 12

1960s Ruler

Triangular Rulers - Sweden

1960s Ruler

Vintage Architect No. 310A Ruler With Case Drafting Free Shipping - Australia

VINTAGE ALVIN NO. 233 Pearwood Architectural Drafting Ruler Scale West Germany $12.49 - PicClick

West German Rulers - UK

3 Pack Architectural Scale Ruler, YIFARUBE 12/ 6 Aluminum Architect Triangular Ruler, Professional Measuring Kit for Architect, Civil Engineer & Draftsman (Black, Red & Blue) : Office Products

JESOT Architectural Scale Ruler, Imperial Measurements 12'', Laser-Etched Aluminum Architect Triangular Ruler Black

SourceTon Pack of 2, Architectural Scale Ruler, Aluminum Triangular Scale Ruler with Architect Scale, Laser-Etched, 12 Inches, Black & Blue : Office Products

Vintage Scale Rulers