Vintage Wood Dietzgen Triangular Scale Ruler 31636 USA

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

Vintage Dietzgen #1667-BG Map Measure Drafting 12" Triangle Scale Japan

Vintage Dietzgen 1656 BP Triangular Scale Ruler Architecture Drafting

Triangular Scale Ruler Eugene Dietzge 1667-BG Germany K & E 1621w USA With Cases

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

Vintage DIETZGEN USSTD 1656B Scale Drafting Engineer Ruler Triangular 6 Scales

Vintage Wood Alvin Dietzgen Triangular Scale Ruler 31636