Hamilton Decagon Open Face Pocket Watch sold at auction on 。The Antique Art Deco 1920s Hamilton Wind Up 17 Jewels Decagon Gold Filled Watch is a vintage women\'s wristwatch with a mechanical manual movement. This elegant timepiece features a unique decagon shape, Arabic numeral indices, and a beige dial with an acrylic crystal. The gold-filled case and bezel add a touch of luxury, while the 12-hour dial and snap caseback enhance its functionality and style. Made in the United States by the renowned brand Hamilton, this watch exudes a classic and sophisticated charm that is perfect for formal occasions and adding a vintage touch to any outfit.