Perpetual Calendar Split-Seconds Chronograph 5204 Rose Gold / Blue / Bracelet

The Patek Philippe Grand Complications 5204/1R-010 is a rose-gold perpetual calendar split-seconds chronograph with a blue dial, produced as an out-of-catalogue execution of reference 5204/1R. The watch is housed in a 40 mm case and fitted with a matching rose-gold bracelet. Reference 5204 forms part of Patek Philippe’s line of perpetual calendar split-seconds chronographs and was introduced in 2012 as the successor to reference 5004. It marked the transition from the Lemania-based calibre used in the 5004 to Patek Philippe’s own calibre CHR 29-535 PS Q, while also increasing the case diameter from 36 to 40 mm. The blue PVD dial combines the chronograph and perpetual calendar indications in the characteristic 5204 layout. The watch displays the hours and minutes together with split-seconds chronograph functions, while the calendar provides the day, date, month, moon phase and day/night indication. The moon-phase display is positioned at 6 o’clock. Power comes from the manually wound calibre CHR 29-535 PS Q. The movement integrates a split-seconds chronograph with a perpetual calendar, allowing two simultaneously started elapsed times to be measured independently while mechanically accounting for the varying lengths of the months and leap years. This 5204/1R-010 is fitted with a detachable rose-gold bracelet and can also be worn on a leather strap. The source describes the blue-dial configuration as an out-of-catalogue piece and suggests that only a small number were produced, although no official production figure is given.