Sterling silver textured three oval flat faux-onyx collar necklace with fold over clasp. Marked "NAPIER©" and "sterling." Center: 1 1/4 inches long. Overall measures: 6 3/4 inches long by 4 inches wide. Interior circumference is about 15 3/8 inches. Excellent condition. An identical necklace was featured in a 1983 advertisement and is shown on pg. 564 of Melinda L. Lewis & Henry Swen's book, "The Napier Co.: Defining 20th Century American Costume Jewelry."