The Sterling B 873 mark appears on silver pieces made of genuine sterling silver, as indicated by the “Sterling” stamp. The letter “B” and the number “873” together serve as a catalog or pattern reference, commonly used by manufacturers to track specific designs or variations. While the maker's name is not included, the format suggests American origin, possibly mid-20th century. Marks like these are especially useful for identifying form, matching with other items, and verifying authenticity. The Sterling B 873 designation helps collectors and appraisers establish context and value even in the absence of a full maker's mark.