For sale is this pair of circa 1930's, unsigned but attributed to Coro, trembler duette clips. They each measure 1 3/4" x 1 1/2" and undoubtedly the missing clip back would have been signed. These clips have the E.A. Phinney for Island patent number that Coro used. The clips have green enamel flowers and gold tone trumpet flowers with white tone trim. They are set with clear round rhinestones and marquise shaped clear rhinestones are set into the trembler flowers in each pin. They have no missing or damaged stones and no plate loss or enamel loss. Clips work perfectly.