Vintage Alvin 110P Triangle Architect Drawing Scale Ruler 3 Sided

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Vintage Alvin 110P Made Denmark Triangle Architect Drawing Scale Ruler

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

Alvin No. 110P 3-Sided Triangle Architect Scaling Ruler WITH CASE! *Pre-owned*

Vintage 3-Sided Architect Triangle Ruler White Plastic Alvin 110P

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