3638

The automatic Calibre 3638 contains 434 components and 39 jewels, providing a 7-day power reserve. Its intricate design manages complex, irregular cycles: center-mounted hours, minutes, and Gregorian calendar; a 12 o'clock sub-dial for double-hour numerals and symbols; a 3 o'clock sub-dial for elements and celestial stems; a 9 o'clock sub-dial for the Chinese calendar month, date, and leap month; a 12 o'clock aperture for the annual zodiac sign; and a 6 o'clock moon phase display.