Description: Omega Constellation Pre-owned Omega Constellation ref 1504.35.00 is part of one of Omega’s longest-running collections, known for its focus on precision and a more refined, design-forward look. First introduced in the 1950s, the Constellation was created to showcase Omega’s chronometer-certified movements, and over time it evolved into something instantly recognizable, especially with details like the Roman numeral bezel and integrated bracelet.