The Omega Constellation reference 131.20.29.20.05.002 features a combination of yellow gold and stainless steel in its construction. This automatic watch, powered by the Omega caliber 8700, has a 29mm case size and a white dial. It includes a date function and is equipped with a chronometer and co-axial escapement. This model was released in 2018, showcasing a blend of materials and advanced watchmaking technology.