Vintage DIETZGEN 31626 Triangular Drafting Architects Scale Wood Ruler

Dietzgen “31626” Engine Divided Wooden Triangular 12” Scale

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

DIETZGEN Architecht Engine Divided Triangular Scale Ruler Engineer 31626 VINTAGE

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

DIETZGEN 31626 ENGINE DIVIDED TRIANGULAR WOODEN RULER

Vtg Dietzgen 31626 Drafting Triangular Ruler 12" Wood, USA

Vtg Dietzgen Wood Ruler # 31626 USA Drafting , Triangular