VINTAGE DIETZGEN SIGNED WOODEN TRIANGLE RULER DRAFTING ENGINEERING US STANDARD

Vintage Architect Wood Triangle Scale Ruler U.S. ST'D Drafting Measurements Tool

Vintage Wood Dietzgen Triangular Scale Ruler 31636 USA

Eugene Dietzgen Co. Triangle Wooden Vintage Drafting Ruler.

Vintage Dietzgen 1509 Scale Ruler Architect Drafting

Vintage 6" Dietzgen Excello Drafting Scale Ruler Rule w/Leather Case #1556 USA

(2) Dietzgen Excello Drafting Ruler 1590 Vintage 12" Length USA Made 1590, 1593D