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

Vintage 12" STERLING Triangular Drafting Architects Scale Ruler

Vintage 12" PICKETT P-232E-ES Triangular Drafting Architects Scale Ruler

Vintage Architects Scale Drafting Triangular Ruler Engineer 12" Lot of 6

Vintage Architect Scale Drafting Triangular Ruler 12” Lot Of 2

Vintage Dietzgen Architects' 12" Triangular Scale Ruler 1656B Excello

Alvin 12" Triangular Drafting Architects Scale Ruler 247, in Case, Boxwood

German Vintage Architects Triangular Drafting Ruler. 12”. Okay condition