An Omega Constellation Chronometer Bi-metal Watch. Model: 1431 - 1980140 Case Material: Steel - Observatory back. Case diameter: 33mm Dial: Gold Numerals: Dots Movement: Quartz Calibre: ETA 255 411 Functions: Date Strap: Bi-metal steel/gold - x2 Bracelets included Buckle: Folding Length of bracelet: 18.5cm Box: Travel case only Papers: No Service: Serviced 2022 The watch appears to be in good working order, no long-term tests have been performed and accuracy cannot be guaranteed, a full service is advised on all watches and pocket watches once purchased. Surface scratches & wear consistent with age The online condition report may not mention mechanical replacements or imperfections to the movement, case, dial, pendulum, separate base(s) or dome. Watches with water-resistant cases may have been opened to examine movements, but no warranties are given regarding their water resistance. It is also important to note that we cannot guarantee the authenticity or originality of individual components, such as wheels, hands, crowns, crystals, screws, bracelets, and wrist bands, since subsequent repairs and restoration may have changed the original components. Also, we cannot guarantee the authenticity or originality of any engraving or re-engraving on watch cases, case backs, bracelets, straps or internal movements