This 25 mm model is made of 18K yellow gold and stainless steel, boasting a bezel with Roman numerals and a sun-brushed champagne dial with diamond hour markers. The scratch-resistant sapphire crystal is complemented by the 18K yellow gold hands, OMEGA logo, Constellation star, and diamond holders. At its core, the OMEGA Calibre 4061 powers this timepiece, while the Constellation Observatory medallion is stamped on the caseback.