Jules Audemars 30th Anniversary Perpetual Calendar has such high precision in its that it is adjusted for months with 30 or 31 days. It is also controlled for leap-years for month of February every 4 years. There is totally no required correction for the dates until March 1st 2100.
It uses an ultra-thin self-winding caliber 2120/2802 that is 28mm in casing diameter and 4mm thick. It has 38 jewels with 355 parts in the movement. Its power reserve is up to 40 hours. The balance vibrates at 19,800 times per hour. All the movement parts are bevelled and engraved with the "cotes de Geneve" motif and circular grains.
The case is made of 950 platinum with a diameter of 41mm and a thickness of 9.15mm. It uses sapphire crystal for the front and caseback. Its water resistance is up to 20m. It has a Tuscany blue dial with white gold applied hour-markers. It has 4 calendar subdials that are polished decorated fillet. At 12, the subdial is the month with indication of 4 years of leap-year in the center. Positioned at 3 is the date subdial. At 6, is the moonphase and power reserve indicator. The day of the week is indicated within the subdial at 9.
It uses large square-scale hand-sewn alligator leather with platinum AP folding clasp.
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