With The First Rotating Perpetual Calendar Month Display Ring In Watch History

This is the most complicated Lange 1 watch. At the 2012 Geneva watch fair SIHH, Lange introduced the LANGE 1 TOURBILLON PERPETUAL CALENDAR watch with the functions of tourbillon, perpetual calendar and month.
   In order to maintain the consistent charm of the LANGE 1 watch, the dial is not designed with a tourbillon to open the window, but is replaced by a traditional small seconds moon phase plate. In addition, the designer of the Lange movement invented the first rotating perpetual calendar month display ring in the history of the watch, which further maintained the cleanliness and original charm of the dial. There are notches of varying depth behind the display ring, corresponding to the number of days in each month.
   The traditional big calendar, week, hour, minute, second, moon phase are all in the traditional position. The leap year display and month indication are located at 6 o’clock on the dial. The hours and minutes at six o’clock are day and night. Pulling out the crown at 3 o’clock, the patented stop-second device can immediately stop the balance wheel in the tourbillon frame, so the watch time setting can be calibrated to seconds.
   The newly developed L082.1 automatic movement is equipped with a 21K gold centered automatic disc, and the middle part is embossed with Lange signature. The centrifugal balance wheel of the automatic disk is made of platinum, with a density even higher than gold, which can inject additional kinetic energy into the winding process. Thanks to the special operation of the movement, the perpetual calendar function of the watch does not have to be adjusted for one day until March 1, 2100; the moon phase display can even operate accurately for 122 years before a day of error occurs.
   This movement consists of 624 parts and uses 68 jewel bearings. The tourbillon gemstone bearing is made of diamond material, which echoes the Lange high-quality bone pocket watch of category 1A. The tourbillon mechanism consists of 69 parts and weighs only 0.5 grams. The vibration frequency is 21600vph / 3Hz.