Vintage Coro brooch. Made from jewelry alloy. There is a brand "Coro Pegasus". United States, 1950s.Coro was founded in 1901. The name of the company was formed from the first syllables of the names of the founders of the brand Emmanuel Cohn and Karl Rosenberg. The brand received its official name in 1943. Adolf Katz became the leading designer of the company. By the mid-1930s, Coro was becoming a leading jewelry manufacturer.