Omega Constellation Co-Axial 38mm, Ref. 123.10.38.22.01.001. Day-date change at midnight with instantaneous jump. Silicon balance-spring on free sprung-balance, 2 barrels mounted in series, automatic winding in both directions. This model features a black dial with day and date windows at the 12 and 6 o'clock positions. The bezel is with its engraved Roman numerals. This watch is running properly. Previous service history is unknown. Photos are part of the description. This is watch and card only, no box. Brand: Omega Model Number: 123.10.38.22.01.001 Series: Constellation Co-Axial Day-Date 38mm Bezel: Stainless Steel Domed Movement: Automatic, OMEGA Co-Axial calibre 8602 Case Back: Transparent Crystal: Domed scratch‑resistant sapphire crystal with anti‑reflective treatment on both sides Material: Stainless Steel Case Size: 38 mm Case Shape: Round Dial Color: Black Band Material: Stainless Steel with Fold buckle Length: 18cm ± 0.5cm Accessories: Card (2016) Water Resistance: 100 Meters (330 Feet) The watch will be packed by bubble wrap securely and shipped by FedEx. Notice: This watch will be sent from Hong Kong, customs might apply in your own country. "If the winning bidder decides to cancel/withdraw they will bear risk, cost of all shipping and return import duties of seller".