What does JWBR and 925 mean on a charm for a necklace?

JWBR typically refers to the maker's initials or the brand name of the jewelry designer, while 925 indicates that the charm is made of sterling silver, which is composed of 92.5% silver and 7.5% other metals, usually copper. This marking signifies the quality and authenticity of the silver used in the charm. Together, they provide information about the charm's origin and material quality.