.935 Box Chain

.925 Italy Hallmark IBB, Sterling Silver Box Chain 22” length 1 mm According to the inter info: What does IBB on silver jewelry mean when also stamped with 925. What does IBB mean on jewelry? “IBB” is the maker's mark. It likely stands for International Bullion & Metal Brokers, which is an international group of companies that manufacture and distribute gold, silver and diamond jewelry. The company was established in London in 1974. “925” means the item is made of sterling silver.”