131.20.28.60.55.001 Omega The Omega Constellation Quartz 131.20.28.60.55.001 watch is another variation of the previous models, but it features a white mother-of-pearl dial instead of a brown or silvery dial. The watch has a 28mm stainless steel case with an 18K Sedna™ gold fixed bezel with engraved Roman numerals and a crown made of 18K Sedna™ gold. The watch also features diamond hour markers and 18K rose gold skeletonized hour hands. The watch functions with hours and minutes only and is powered by a quartz movement, specifically the Calibre 4061, with a battery life of 48 months. The Omega logo is located below the 12 o'clock position. The case thickness is 8.5mm and the case back is solid. The front of the watch is protected by a sapphire crystal. The watch comes with a stainless steel and 18K Sedna™ gold bracelet with a folding buckle. The water resistance of the watch is up to 30m, making it suitable for everyday wear but not suitable for swimming or diving. Overall, this watch combines luxury and modern technology to create an elegant and sophisticated timepiece that is perfect for daily wear. The mother-of-pearl dial adds a unique touch to the watch, making it a beautiful accessory for any occasion.