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

F.Weber Co. Drafting Equipment

Dietzgen 1626 Wooden VTG 3 Sided Triangular 12" Ruler Scale Drafting Vintage USA

VINTAGE DIETZGEN SIGNED WOODEN TRIANGLE RULER DRAFTING ENGINEERING US STANDARD

Vintage Dietzgen Globe T-Square 12066-24 Drafting Ruler Engineering Tool Wooden

Wood K&E Keuffel & Esser Triangle Scale Ruler Drafting 12" Length Vintage

Vintage F. Weber & Co 4501 Wooden 3 Sided Triangle Drafting Ruler Engineer 12"

Dietzgen 1631 Wooden 3-Sided Triangular Ruler Scale Drafting Vintage USA 12"