Jaeger-LeCoultre Commercial Polaris Perpetual Calendar: A feat of precision 2025

VIDEO Jaeger-LeCoultre Polaris Perpetual Calendar: A feat of precision TV commercial 2024 • Polaris Perpetual Calendar: A feat of precision and miniaturisation | Jaeger-LeCoultre The Polaris Perpetual Calendar introduces the in-house calibre 868 which automatically takes into account the irregular lengths of the months and the occurrence of leap years. The date, month and day indicators are at 9, 12 and 3 o’clock respectively, and the moon phases are at 6 o’clock – a retrograde display for the Southern Hemisphere framing a classical display for its Northern counterpart. Discover more: bit.ly/Upwiththetimes #JaegerLeCoultre #Polaris 0:00 [Music] 0:02 for watch makers a perpetual calendar is 0:05 among the most challenging complications 0:07 to 0:10 master that is because on top of the day 0:13 and date it must automatically take into 0:15 account The Irregular length of the 0:17 month and the occurrence of leap 0:19 years since making its first perpetual 0:22 calendar pocket watches at the end of 0:24 the 19th century Jer lult has fully 0:27 mastered these remarkable mechanisms 0:30 the Polaris perpetual calendar features 0:33 the latest generation caliber 0:35 868 it is made of 351 components a feat 0:39 of both precision and 0:43 miniaturization the Perpetual calender 0:46 mechanism is based on an ingenious 0:48 system of Gears levers and cams the 0:51 command system is the key 0:54 component all starts with the date 0:56 indication that sets up the rest of the 0:59 perpetual calendar 1:00 it is operated by means of a lever that 1:03 follows a 31 tooth wheel and controls 1:05 the day setting via 7po star-shaped 1:10 wheel the 48 month wheel is the 1:12 mechanical memory that enables the 1:14 calculation of 1:16 leaps its 48 teeth correspond to the 1:19 number of months in one Leap Year cycle 1:22 when the date control levers reads the 1:24 information on the month wheel the 1:26 mechanism knows the month and its number 1:28 of days according according to its 1:30 position on the wheel whether on the top 1:32 of the tooth or the inside of the notch 1:35 more precisely this deep tooth 1:37 corresponds to February and 28 days the 1:40 following one to March and 31 days then 1:43 to April and in 30 days and so on for a 1:47 month of fewer than 31 days a double 1:50 correction is always made automatically 1:53 here is an example of a change from 1:55 February 28th to March 1st a first hook 1:58 enables the change from the 28th to 31st 2:01 then a second hook completes the 2:03 correction and the passage to March 2:06 1st the 48 month wheel moves the month 2:09 counter which in turn is linked to the 2:11 year and decade changes the calendar 2:14 settings will not need any manual 2:16 correction until the year 2:19 201100 in a pleasing reminder that 2:21 calendars had their origins in 2:23 astronomical phenomena a sub dial at 2:26 6:00 displays the moon 2:28 faces in the aperture of the subdial the 2:32 classical display shows Northern 2:33 Hemisphere moon faces the southern 2:36 hemisphere moon faces are indicated 2:39 thanks to a retrograde hand this display 2:42 is made up of an ingenious mechanism 2:44 consisting of a cam and two rakes that 2:47 move in opposite directions following 2:49 the lunar cycle duration of 29 days 12 2:52 hours 44 minutes and 2.8 seconds at the 2:57 end of each cycle the tip of the cam 2:59 dries saes the return of the rags 3:01 allowing the retrograde hand to reach 3:03 its initial position in only 0.05 3:07 seconds true to Lon M's guiding 3:10 philosophy of maring tradition and 3:12 modernity the Polaris perpetual calendar 3:15 has brought one of H's most complex 3:18 useful and priz complications into the 3:21 world of contemporary sporting Elegance - advertisement spot 2024