Design patent D148,246 issued to Adolph Katz in 1947
This Duette, Coro’s name for their double-clip brooch, is a pair of leaves with emerald-cut and round diamanté set in rhodium-plated base metal. Designed by Adolph Katz, this piece can be worn as a brooch or as separate fur clips. This substantial double-clip brooch was advertised in the December 1, 1947 issue of Vogue and the April 1948 issue of Mayfair. The ad in the last photo shows an example of how to wear the clips. You can see the utility patent for the brooch mechanism here, beneath Coro’s name.