This happens during the production process. The main reason is that the module is too small for stamping 925 or 990. What is Sterling Silver . (3) Ring hole 4mm.
925 Sterling Silver Diamond Cut Rope Chain Necklace .925 Italy All Sizes
925 Sterling Silver BOX Chain Necklace All Sizes Stamped .925 Italy
Real SILVER Unique Jewelry SOLID 925 Sterling Silver Chain Necklace Made Italy
Real Solid 925 Sterling Silver Mens Boys Curb Cuban Bracelet or Necklace Italy
Real 925 Sterling Silver Italian Tarnish-Resist/Nickle-FREE Snake Chain Necklace
5MM Thick Solid 925 Sterling Silver 40MM French Lock Hoop Earrings Made In Italy
