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Many talented jewelry designers worked at Coro over the years, and it was the job of Adolph Katz to select from among the competing designs the ones that Coro would manufacture and introduce to the market.
He also reviewed some of the many independent designs that were submitted to the company, and he often selected designs from this pool as well for Coro to manufacture.
Katz also filed most of the Coro patents including some interesting filings for mechanisms that were used in some of the Coro jewelry designs.
One example of a patented mechanism was the Coro Duette, a double clip patented in 1931 that you could combine into a single pin through an innovative interlocking catch.
Founded as an accessories boutique in New York City, Cohn and Rosenberger were businessmen who focused on business operations and growth, but they nevertheless had a good eye for the arts, hiring very talented professional jewelry designers who were allowed to develop their own creative visions at Coro.
Even manufacturing was outsourced until they finally purchased their own facility in Providence, Rhode Island in 1929.This facility grew to be the largest costume jewelry manufacuting operation in the world, using advanced production line technology and employing up to 3500 workers at the peak of operations.The company concentrated on sales and growth, led by the ambitious Director of Sales Royal Marcher.Among the well known jewelry designers who worked at Coro at some point in their careers were Gene Verecchio, Robert Geissman, Massa Raimond, Oscar Placco, and Francois, who specialized in floral pins and went on to found his own jewlery company.Despite this roster of talent, most Coro jewelry is not individually marked with the designer's name and is only marked as the work of the company.As a result, Coro came to be known for a certain design aesthetic that was largely correlated with the designs that Adolph Katz chose to commission for the company.