The Omega Constellation reference 131.15.29.20.55.001 features a 29mm stainless steel case with a white mother of pearl dial. This timepiece is powered by the automatic winding Omega caliber 8700, which includes a date function and is certified as a chronometer. It incorporates a co-axial escapement for enhanced precision. This model was released in 2018, showcasing a blend of modern technology and classic design elements.