A year after having presented the world’s thinnest split-seconds chronograph, the Geneva workshops of Patek Philippe have come out with a new automatic chronograph watch the Ref. 5960P Annual Calendar Chronograph. The case is platinum and measures a record 40.5mm. It is water resistant to 25 meters. Movement is the new automatic Patek caliber CH28-520 IRMQA24H with 40 jewels, a 55 hour power reserve and a flyback column-wheel, a power reserve indicator, an annual calendar, and day/night display. The patented Patek Philippe Annual Calendar is a full calendar that automatically recognizes months with 30 and 31 days and, assuming that the watch is always running, only needs to be manually corrected once a year on March 1. It displays the day of the week, the date, and the month in three apertures, and it also controls the day/night indicator at 6 o’clock. Its modular design expands the scope of applications of the new chronograph caliber, providing future latitude for extra functions.