A GROUP OF CORO AND MAZER COSTUME JEWELRY, including a polychrome enamel bird double clip brooch, of silver metal, the brooch stamped Coro Duette, circa 1930; together with a brooch of floral motif, of gilt metal, with Coro printed on a paper hang tag, and a retro motif brooch of gilt metal, stamped MAZER, both brooches circa 1940. (3)