VERY IMPORTANT NOTE This is not just any brooch. This is THE Actual book piece of the Eisenberg Originals jewelry identification book by Sharon Schwartz.Schwartz's PERSONAL COLLECTION and provenance CAN BE PROVEN. Any collector who knows anything about Eisenberg signed jewelry knows this is an extremely rare opportunity not because it is "a" book piece. It is THE book piece in incredible condition for the age. Signed Eisenberg Original Sterling silver 1940s fur clip brooch.