Silvertone and black Lucite collar necklace with fold over clasp. Marked "Napier." From Napier's 1988 Jet Collection. An identical necklace is shown on pg 622 of Melinda L. Lewis & Henry Swen's book "The Napier Co.: Defining 20th Century American Costume Jewelry. Measures: 7 inches long  by 6 1/2 inches wide. Center: 1 3/8 inches. Interior circumference approximately 14 1/4 inches. Condition: Very good; minor wear.