Swiss made, automatic, 27.50 mm/3.88 mm, 3Hz (21,600 vph), 48-hour power reserve, 239 total components, 33 jewels. Geneva strips, perlage, chamfering. Gyromax balance free sprung balance and Spiromax balance spring. Functions include hours, minutes, display of 24 time zones with synchronized adjustment of displays in one-hour steps for the hour hand and 1/24th counterclockwise increments for the city disk and the 24-hour ring, day/night indication.