Released in 2012, the Patek Philippe Perpetual Calendar Split Seconds Chronograph 5204 is an icon for a brand known for its complicated watches. This watch has a number of features, including day, date, month and moonphase calendar, as well as a leap year calendar and night hours indicator. On top of all of that, it also features the split second chronograph which allows the user to time two concurrent events. This platinum Patek Philippe 5204P is in like-new condition and comes complete with original box, papers and second solid caseback.