Coro Sterling and Enamel Rhinestone Owl Duette with Earrings One of the most adorable of the Coro duettes are these owls. Their big beautiful eyes are large faceted blue rhinestones. The feathers are enameled with rhinestone accents set in sterling vermeil. The owls can be worn as a pin or seperately as fur/pin clips. Signed sterling Corocraft, frame signed sterling, Coro Duette, Pat 1788861, earrings signed sterling, Duette measures 1-3/4" by 2", one clip measures 1-3/4" by 7/8", earrings measure 5/8" by 1/2" with screw backs. There is wear to gold foil on the owl's eyes on the earrings, otherwise in excellent condition.