Vintage Alvin Triangular Architectural Drafting Ruler No 110P Made W. Germany

Vintage Alvin 110P Triangle Architect Drawing Scale Ruler 3 Sided

Vintage Alvin Triangular Scale Ruler No 110 P Architect 12" West Germany

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

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

Vintage ALVIN Triangle Scale Architect Ruler- Made in Germany 110P 13"

VINTAGE ALVIN NO 110 PX DRAFTSMEN RULER MADE IN W-GERMANY