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 .
Genuine Solid Sterling Silver End Cap Set for 2mm Cord (2.4mm end caps)
Sterling Silver Lotus Leather Cord End Cap with Hook Clasp for Bracelet
Job lot 10pcs 925 Sterling Silver Box Chain Bracelet Base Sliding Bead Ball End
10x Solid Sterling Silver 925 Clamshell Calottes Bead Tip End Jewellery Making R
925 Sterling Silver CALOTTE CLAMSHELL - Bead Cap, End Tip, Knot Cover Finding
Sterling Silver 925 Necklace End Tag for Clasps | Jewellery Making
