Alvin basic line 504 compass draftsman

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 Basic - Line 504 Drafting Compass W. Germany

Alvin Basic-Line 504 Drafting Compass W Germany Vintage Precision Tool with Case

Alvin Basic-Line 504 Compass Draftsman Kit, W. Germany, New! Still Sealed

New Alvin Bow Compass #504 Made in Germany

Alvin Basic-Line 504 Compass Draftsman Kit, W. Germany, Never Used Still in Case