Vintage Sterling Architect Scale White Plastic Triangular 12" Ruler #3

Vintage Sterling Architect Scale White Plastic Triangular 12" Ruler

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Vintage Sterling Architects' 12" Triangular Scale Ruler

Vintage Architect's 12" Triangular Plastic Scale Ruler ~ Made in U.S.A.

Vintage 12" STERLING Triangular Drafting Architects Scale Ruler

Architect Triangular Scale Ruler 12" Model 110P White with Black Graduations, Ar