Eberhard &, Co, Navy Master, ref. 31011/B6, steel chronograph watch with calendar and moon phases, 1980s Movement: cal. Valjoux 7751, automatic, 17 jewels Case: diam. 34 mm Complications: 2-counter chronograph with central seconds, moon phases, aperture for day and month, date display, 24-hour display, subsidiary seconds counter Signature: dial, movement, case General condition: Fair. Black dial: Excellent condition. Gilded and luminescent applied hands and hour markers: Very good condition. Plexiglas: Poor condition, numerous scratches. Case and bracelet: Average condition, numerous scratches and marks. Days and months in French. Circumference approx. 18.5 cm. The watch is in working order at the time of writing. This fact must be considered in relation to its age. We do not guarantee its future operation. It has not been tested over a long period and we therefore cannot guarantee the accuracy of the movement or the power reserve. Services or restorations may have been carried out on the entire watch, resulting in the replacement of parts that may not be original (dial, hands, parts of the movement, bracelet, etc.). As the watch has been opened, we cannot guarantee that it is water-resistant. Unless otherwise stated, we have no information on the last service performed and we advise you to have the part serviced.