Vintage Picket Triangular 3-sided Architect Ruler P-232 A, Vintage Drafting Tool, Geeky Gifts Vintage Mathematics Tool, Vintage Science Tool

The color coded center groove easily identifies scale graduations. Measurements are precision-etched into a durable laminated plastic for accuracy. Comes in a protective case. The color coded center groove easily identifies scale graduations. Measurements are precision-etched into a durable laminated plastic for accuracy. Comes in a protective case.

Chartpak Triangular Scale Plastic 12 inch Architectural Color-Coded

Math Model Vintage

Vintage Math Tool

Vintage Math Tool

Geek Maths Card

Ruler Mathematical

Mr. Pen Architectural Triangular Ruler Set with 12 Inch Triangular Scale, 11 Inch 30/60 and 8 Inch 45/90 Triangles : Office Products

Vintage 1950s Stapler Wilson-jones T-230 Buddy Jr Imperial

Golden Brass Math Geometry Set Vintage Protractor Math Geometry Education Drawing Tool Architects Students Draftsman School Stationery Office Supplies - Protractor

15cm Triangular Architect Scale Ruler Three-sided Ruler Used by Architects

Architect Ruler In Collectible Drafting Tools for sale

Mathematical Tool

3 Sided Ruler - UK

Vintage Stanley Pull Push RULE No 546 Rare USA 72 Tape - UK