The Omega Constellation ref: 123.10.38.21.01.001 features a stainless steel case with a diameter of 38mm. It is powered by the automatic winding Omega caliber 8500 movement, which includes a co-axial escapement for enhanced precision. The watch displays the date function and is classified as a chronometer, ensuring reliable timekeeping. The black dial adds a sleek contrast to the overall design, making it a versatile choice for various occasions.