5270R, Perpetual Calendar Chronograph, Pink Gold

The Perpetual Calendar Chronograph was first created by Patek Philippe as a complication, who still define the category today through this: ref. 5270. The Perpetual Calendar Chronograph and Patek Philippe are synonymous. In 2011, this ref. 5270 took the throne previously occupied by the 5970. The 5270 was Patek Philippe's first entirely in-house designed, manufactured, and finished Perpetual Calendar Chronograph movement (calibre 29‑535 PS Q), marking a significant new chapter and end of the Lemania ébauches. The 5270 is the culmination of decades of learning in movement manufacture, a showcase of Patek Philippe watchmaking.

The very first Perpetual Calendar Chronograph was released in 1941, reference 1518. This wartime innovation was not only well ahead of its time, it was built to last far beyond its time. The 1518 marked the start of serially produced complicated calibres at Patek Philippe. That prowess is the foundation their watchmaking has built around today. From 1941 until today, the Patek Philippe Perpetual Calendar Chronograph (non-rattrapante) has evolved through just five main references. In order, they are 1518, 2499, 3970, 5970, and this 5270. 80 years later, in 2011, the 5270 introduced the first entirely Patek Philippe Perpetual Calendar Chronograph the world has seen.

The 456-component calibre 29‑535 PS Q which resulted is optimized for thinness and beauty. It uses a traditional column-wheel architecture with a state-of-the-art lateral clutch for aesthetic consideration. The calibre incorporates six patents to virtually eliminate any lateral clutch efficiency issues. Highlights include an optimized tooth profile, functional column wheel cap controlling drive wheel mesh depth, slotted minute cam, and synchronized clutch/blocking levers. All this effort was made purely to make the chronograph more beautiful to observe. The chronograph includes a new jumping minute counter, where as soon as the chronograph crosses 60 seconds, the minute counter jumps to 1 instead of lazily scrolling. Above the chronograph lies an integrated 182 component perpetual calendar. Truly hand finished bevels adorn every bridge, with Geneva striping, black polish, perlage, and ample depth. 

This bracelet model, ref. 5270/1R-001 was released in 2018. The pink gold bracelet features a droplet bracelet, which fits so seamless into the case that pusher extensions are integrated into the end links. For the occasion, the R was treated to a black dial. 

The dial of the 5270 displays a wealth of information in as clear a manner possible. The dial is very delicately grained, with subdials radially grained. This pink gold example features a deep black dial with pink gold indices. The 5270 dial has evolved considerably over production, beginning with no tachymetre, then a tachymetre scale which has come to be known as 'the chin', finally landing on this simplified design with an intersecting scale at the bottom of the date track. The small apertures are for AM/PM and leap year indication. These were both inspired by the historic ref. 3450. The two calendar apertures above the Patek Philippe signature, a hallmark of the Patek Philippe Perpetual Calendar Chronograph, have increased in size. This proportional increase leans into the model's most recognizable feature and accentuates it. The 5270 is proportionally more contemporary than anything before. Compared to its predecessor it is 1mm larger but an impressive .6mm thinner, resulting in an overall flatter appearance. The flared, stepped lug profile recalls the 2499, while adding its own new sculptural character. Additionally, its lugs are more aggressively angled downward than the 5970 case.

The 5270 is a significant step toward complete autonomy for Patek Philippe. Its design is respectful of its ancestry, but with a contemporary edge. The reference has not had the time since 2011 to be appreciated in the same way that the earlier preceding references are. Yet, in almost all tangible aspects, the 5270 represents significant advancement in design and mechanics. The 5270 offers a kind of imposing beauty. It is the best of contemporary Patek Philippe watchmaking.

This 5270R presents in great overall condition. Its case sports light signs of occasional wear without refinishing. The are light hairlines commensurate with occasional wear and two small marks on the top of the lower left lug. The clasp bears no marks. Calibre 29‑535 PS Q is running well in specification with all functions operating perfectly. It comes on its original strap with all original boxes and papers. It comes on its original bracelet.

This example is modelled on an average-sized 7-inch wrist.