Vintage Sterling MFG Co. Triangular Scale Engineer Drafting Ruler white

This triangular scale is in good condition, it marked ‘STERLING’ on the scale, and ‘Alvin’ on the case.

Lot of 3, 12 TRIANGULAR SCALE Ruler Architect, Engineer, Mechanical Drafting

Standard Imperial Measurements: This architect's ruler has 3 Sides & 6 Different Scales. Triple-sided scale included: 1-1/2, 1, 3/4, 3/8, 3/16,

Architectural Scale Ruler for Blueprint, 12'' Metric Metal Engineers Triangle Drafting Ruler with Imperial Measurements for Architects Engineering

WOODEN TRIANGULAR ENGINEER Drafting Scale Ruler -- Boxwood (2) $8.99 - PicClick

Vintage Scale Rulers

Drafting Tools, Engineering, Science & Medicine (1930-Now), Collectibles - PicClick CA

ECYC 12 Triangular Scale Ruler 1:100/200/250/300/400/500 Plastic Engineering Mechanical Drafting Ruler : Office Products

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

Vintage C-Thru Ruler Company no 255 360 Degree Protractor 3 1/2 Clear

Vintage Sterling Architect Scale White Plastic Triangular 12 Ruler

Alvin 6 Plastic Engineer Triangular Scale Set

Triangular Ruler In Collectible Drafting Tools for sale

Triangle Ruler A.W. Faber Castell 853/Z1 Scale Drafting Tool Made in G