Vintage Dietzgen Triangular 12" Drafting Excello Ruler 1667; Made In USA

Vintage Dietzgen Architects' 12" Triangular Scale Ruler 1683B Excello

Vintage Rulers Pickett Dietzgen W&G made in Australia Triangle Engineer Drafting

Dietzgen 12" Triangle Ruler 1667-BG made in Germany and Graph Paper made in USA

Vintage 12” Triangular Scale | Dietzgen | #31626 | Made In USA | Wooden

Vintage Dietzgen Engineer’s 12 in. Triangular Scale Ruler 1667BP USA

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

Vintage Dietzgen 11626 Architect Drafting Triangular Ruler 12" Hardwood Yellow