12" architect scale ruler DIETZGEN 1667 BP, 21626, yellow color

Vintage DORIC Genuine Boxwood Triangular Ruler Made In Germany #56 3852

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

Ruler: DIETZGEN 1626 some wear vintage triangle ruler

DIETZGEN 31626 ENGINE DIVIDED TRIANGULAR WOODEN RULER

12” Triangular EngineeringDraftsman Scale. Wooden

DIETZGEN Architecht Engine Divided Triangular Scale Ruler Engineer 31626 VINTAGE

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