1950s square silvertone offset with two sections of square white resin and two sections of square black resin forming a checkered pattern butterfly clip back earrings. Marked "NAPIER PAT. PEND." Measure: 1 3/8 inches across. Condition: Very good; some light wear with some dark spots to the back. A turquoise version of these earrings is shown on pg. 269 of Melinda L. Lewis & Henry Swen's book, "The Napier Co.: Defining 20th Century American Costume Jewelry."