Alvin Basic Line 505 Drafting Compass - Made in West Germany

Vintage Alvin Basic - Line 504 Drafting Compass, made in Germany

Alvin Basic-Line 504 Drafting Compass Bow Compass Made in West Germany with Case

Vintage Alvin V Drafting Compass Made In West Germany 5in-130mm

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VTG Alvin Basic Line 505 Drafting Compass - Made in West Germany - EUC - Unused?