The "1928" tag most likely represents the brand or the name of the company.
The 1928 Jewelry Company creates finely detailed fashion jewelry, replicas of vintage jewelry drawn from a wealth of antique designs. Their jewelry line contains bases of silver, gold and bráss metals with crystals, simulated colored stones and pearls including mother-of-pearl and imitation colored gemstones and beads, with a “1928” mark.
They also own the brand 2028, which was developed as an exclusive line for Macy’s Stores that will feature more fashion forward designs with the choices containing premium quality components honoring “every woman’s exclusivity” from the rich to the middle class consumer, and for those who want and desire the today’s fashion look of fine jewelry.
Solid gold jewellery is a purchase that you will be able to enjoy for life, even generations, so before you make a purchase it is wise to educate yourself on the different standards of gold available. Check out some tips for buying gold at Edgeonly.com.