Vintage Post Boxwood 3-Sided Ruler 7311 Engineering, Drafting

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

Vintage Post Boxwood 3-Sided Ruler #1306 - Engineering, Drafting

Alvin 3 Sided Engineer Scale No 119 PC Triangular Drafting Ruler W-Germany

2 Vintage Triangle wood 12" rulers for drafting, architecture, engineering

Vtg U.S. ST'D Wood Drafting Ruler Triangle 3-Sided Vintage 12" Dietzger

Lot of 3 Vintage Drafting Tools -Brass Protractor, Divider, Wooden 3-sided Ruler

Vintage Keuffel & Esser NY 3 Sided Wood Drafting Rulers LOT of 2