123.20.38.21.02.009 Omega The Omega Constellation Co-Axial Master Chronometer 123.20.38.21.02.009 is a beautiful watch with a 38 mm stainless steel case and an 18K yellow gold fixed bezel that is engraved with Roman numerals. The crown is also made of 18K yellow gold, adding to the luxurious look of the watch. The silvery dial features an embossed lozenge pattern and yellow gold tone hour indexes and luminous hour markers. The hour hands are skeletonized and also made of yellow gold tone, giving the watch a cohesive and sophisticated look. The watch has a date window located at the 3 o'clock position and performs several functions, including hours, minutes, seconds, and date. The Omega logo is located below the 12 o'clock position. The watch is powered by a self-winding movement with a Co-Axial escapement that is powered by the calibre 8500. The power reserve of the watch is approximately 60 hours. The case thickness is 12.5 mm, and the case back is transparent. The watch features sapphire crystal on the front and back to protect the watch. The bracelet is made of stainless steel and 18K yellow gold and features a folding buckle. The water resistance of the watch is up to 100 meters, making it suitable for swimming and snorkeling but not for diving. Overall, the Omega Constellation Co-Axial Master Chronometer 123.20.38.21.02.009 is a stunning watch that combines stainless steel and 18K yellow gold to create a timeless look. The embossed lozenge pattern on the dial adds a unique touch to the watch, making it stand out among other luxury watches. It is perfect for those who appreciate classic design with a modern twist.