It is marked STERLING PATENT on the back of the handle along with the Alvin hallmark.
Antique 2-ALVIN STERLING SILVER N61 Napkin Rings Mono
Vintage Alvin Sterling Silver Teaspoon Geometric Art Deco Style 5½”
Bridal Rose by Alvin Sterling Silver Master Butter Flat Handle 7 1/4" Heirloom
New 7 Pc Set Alvin Sterling Silver Cordial Cups & Tray American MCM 2.75/6.5”
Vintage Alvin Sterling Silver Holloware Salt & Pepper Shakers S89
Apollo by Alvin Sterling Silver Jelly Cake Server Pierced
