Vintage ALVIN 12" Triangle Ruler #241B

Alvin No. 110P Precise Triangle Architect Drafting Scale Ruler West Germany 12"

Engineers Ruler Set-Vintage 12" Triangle Wood & Plastic 6"-US ST'D-Alvin Italy

Vintage E.B.B. & S. NY Wooden Triangle 12" Engineering/Drafting Ruler

Alvin White Triangle Scale Ruler 12” Architect No. 11 Drafting Poland *Flaws*

Alvin No. 110P Precise Triangle Architect Drafting Scale Ruler West Germany 12".

Vintage Alvin Architect Boxwood U.S.ST’D England Triangle Wood Ruler

Lot of 2 Alvin Triangle Scale Ruler Architect Germany 110P Pickett P-232E Japan