DIETZGEN Architecht Engine Divided Triangular Scale Ruler Engineer 31626 VINTAGE

Dietzgen “31626” Engine Divided Wooden Triangular 12” Scale

Triangular Ruler Vintage Wood Dietzgen 31626 Architect 12” U.S. STD

Vtg Dietzgen 31626 Drafting Triangular Ruler 12" Wood, USA

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

DIETZGEN 31626 ENGINE DIVIDED TRIANGULAR WOODEN RULER

Vintage Triangle Ruler - DIETZGEN ENGINE DIVIDED 31626, USA

Dietzgen “31626” Engine Divided Wooden Triangular 12” Scale