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

Dietzgen Wooden 3 Sided Triangular Ruler Scale Drafting Vintage 31626 USA 12"

Vintage Dietzgen No. 31626 Wooden 3-Sided Triangular Scale Ruler--for drafting

Vintage Dietzgen 1509 Scale Ruler Architect Drafting

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

2 Vintage 12" Triangular Scale Drafting Ruler Pearwood and A&E, Germany & USA

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

Dietzgen Wooden 3-Sided Triangular Ruler Scale Drafting Vintage USA 12" w/Case