Bundle with other cufflinks and save on shipping! Navy Blue and Heather Green Marked Silver 925 Stamped with BB Golden Fleece logo Following 1868, sterling silver became the standard for coins, and in 1907, a standard sterling silver mark was introduced. The Federal government now required manufacturers to mark sterling silver pieces with a “925” mark, guaranteeing that the piece was at least. 925 or 92.5% silver. This acted like an assay mark.