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

Mathematical Tools

Vintage Folding Ruler No. 22P Made in the USA Hinged Wooden - Canada

Vintage U.S.ST'D Wood Triangle Scale Architect Ruler Pearwood Lierz 3205-63 Germany & Others Lot Of 3. Condition is Used. There are some scratches,

Vintage U.S.ST'D Wood Triangle Scale Architect Ruler Germany & Other Lot Of 3

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

Mathematical Tools

Mathematical Tools

3 Sided Ruler

Pickett Architect Triangular Scale, 12-Inch Long, Plastic, White (235A) : Drafting Tools : Office Products

Vintage Math Tool

Scientific Ruler - Australia