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Marked CID, which is the hallmark for jewelry maker Clyde Duneier Inc. of New York. This mark was first trademarked in 1991 and was canceled by 1997. A famous jewelry making firm in New York since 1910.
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.