Case material: Steel; Charge: Automatic; Conditions: Never worn Presentation condition : With boxes and all papers; Price on request Gmtbroker Reference: j010110270 Jaquet Droz j010110270 Complete Details: This watch features: Polished Stainless Steel case. Dial: Natural blue aventurine quartz main dial. Oval & off-centered inlaid mother of pearl center. Polished white gold minute hand. Silvered printed dot minute track. Complications: JUMP HOURS: unlike regular watches with an hour indicator displayed via a hand rotating around the dial, this watch displays the hour via window located beneath the 12 o'clock position. The hour indication "jumps" forward as the minute hand passes the 60 minute mark - hence the term "JUMP HOUR". TWELVE CITY TIME ZONES: The watch can easily be changed to time-zones in 12 different cities by clicking the button located on the case edge at the 2 o'clock position the hour display will jump to the correct time in the corresponding city displayed in a window located at the 6 o'clock position. The following twelve cities/timezones are featured on this watch: Geneva Istanbul Moscow Dubai Aspen Mexico New York Beijing Tokyo Sydney Azores London Jaquet Droz Caliber 5153, beats at 28,800 vph, contains 28 Jewels & has an approximate power reserve of 68 hours. Featured Complications: World Time This watch is also known as j010110270