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This Coro Duette is a book piece. It can be found in multiple books. A photo of the page is included. The piece was patented in June of 1938 by Gene Verrecchia. All stones are present. See photos.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.