You can view it here: My Classic Jewelry Trifari Vintage Jewelry Marks Guide Vintage Jewelry Marks Resource: You can search for “vintage jewelry marks” for information about the jewelry marks used by various jewelry companies.
Just scroll down a little and click the letter of the alphabet for the company marks you wish to view.According to Lang Antiques’ Antique Jewelry University, the term “hallmark” refers to any stamps or marks on jewelry and usually includes one or more of the following: Purity marks for older silver pieces can differ from those commonly seen today.For example, most Sterling Silver Jewelry up until the 1940s era was usually stamped “STERLING” or “STER” or “STG.” The “925” mark did not come into common use until later.Some makers continue to use the “STERLING” mark in place of “925” even today.
Vintage jewelry from other countries may have European purity marks, such as “585” for 14K gold and “750” for 18K gold, as shown in the photo below.
As a general rule, signatures without a copyright symbol indicate the piece was manufactured prior to 1955. Jewelry companies would often use up their supply of pre-stamped clasps and findings after switching to a new signature, so some pieces made soon after 1955 might not have copyright symbols.