Vintage Lot of 6 Alvin Made in Germany Plastic Design Tools

Alvin Professional 6 Inch Bow Compass 201 Made in Germany

Alvin 30/60 Professional Topaz Triangle 6" - T160-6 - Brand New in Sleeve

Precision Geometry Set 15 Pc Compass Protractor Ruler Divider Math Tools Kit

Vintage Drafting Tools Lot: Alvin, Keuffel & Esser, Plasticoid Triangles &

Alvin Architect's Kit 12 Piece Drafting Architecture Tools Engineering VTG NOS

Alvin 843 - G Introductory 4.5" Bow Compass Made in Western Germany Vintage

Polished Solid Brass Beam Compass 30" with Brass 8"Inch Divider Compass