What does FBM 585 mean on a bracelet?

FBM 585 on a bracelet typically indicates the manufacturer or designer's mark (FBM) and the gold purity level (585), which signifies that the bracelet is made of 14-karat gold. The number 585 means that the piece contains 58.5% pure gold, with the remaining percentage consisting of other metals. This mark is commonly found on jewelry to assure buyers of the quality and authenticity of the material.