Avon Smithsonian Christmas Toy Horse Brooch. My understanding is that since 1996, Avon and the Smithsonian teamed up to make jewelry based on USPS Christmas stamps. This one depicts the 6c stamp and features a goldtone and rhinestone antique horse on wheels. Still on its original card, this brooch and the card are in excellent condition. The brooch is marked AVON on the back. A great gift for any jewelry lover or stamp collector. Pin measures 1 1/2" x 1 1/2" and the card measures 3 1/4" x 2 3/8".