The Patek Philippe 5978P-010 Instantaneous Perpetual Calendar Chronograph Limited Edition Milano 2026

Patek Philippe’s Watch Art Grand Exhibitions are important milestones for the brand, offering a unique opportunity to showcase its savoir-faire, heritage and exceptional métiers d’art to both an audience of watch enthusiasts and the wider public. Especially for these exhibitions, Patek Philippe introduces special and limited editions; sometimes even introducing new watch references, movements or technical innovations that may find their way into the permanent collection. Six limited editions were presented in Tokyo (2023), six in Singapore (2019) and nine in New York (2017). The Watch Art Grand Exhibition Milan 2026 is no exception, with 7 limited editions reserved for the Italian Market, and among the different new watches introduced by the brand, the most discussed will surely be the new 5978P. Simply because it is a new milestone in an emblematic Patek Philippe lineage, a combination of complications for which the brand has a unique legacy: the chronograph and perpetual calendar.

Patek Philippe holds a legendary status when it comes to chronograph perpetual calendars. This started in 1941 with the reference 1518, which made history by scaling these two complications into a wristwatch, establishing a visual design language for complex wristwatches and kicking off a famous lineage of ‘high complications’. Later followed the legendary ref. 2499, the incredibly balanced 3970, the TV-shaped 5020, the remarkable 5970 or the modern 5270, which introduced a movement based on the brand’s CH 29-535 chronograph. If you want to dig into its history, check out the History of the Patek Philippe Perpetual Calendar Chronograph Collection.

The new Patek Philippe 5978P-010 stands out with its new hand-wound calibre CH 29-535 PS QI, an instantaneous perpetual calendar chronograph. It is based on a combination of two famed mechanisms of the brand: the CH 29-535 PS chronograph (introduced in 2009 – six patents) and the instantaneous perpetual calendar module seen in the R CHR 27 PS QI calibre (seen in the ref 5207, 5308 or 5208). In this respect, the new 5978 almost feels as if it had always been part of Patek Philippe’s collection. Yet this does not diminish the significance or appeal of this new model… Quite the contrary, actually.

Its new hand-wound movement can be admired via the exhibition case back of the watch that features the “Patek Philippe Milano 2026” caption. True to the grande tradition of manual-wind chronographs, it combines a horizontal clutch and a column wheel – fitted with a polished cap in line with Patek’s tradition. The four perpetual-calendar indications jump instantaneously in just 30 milliseconds (!), with all four calendar windows changing simultaneously. Unlike progressive calendar mechanisms, the instantaneous calendar jump requires energy to be accumulated over several hours and then released within a fraction of a second, driving the calendar discs rapidly and precisely. The calibre CH 29-535 PS QI comprises no fewer than 500 parts and 33 jewels. Its Gyromax balance features a Breguet overcoil hairspring and runs at 4 Hz. Its power reserve is indicated at min. 55 hours, max. 65 hours.

The reference 5978P-010 is presented in a classic and elegant round case in platinum that is 42mm in diameter and 14.2mm thick. Fully polished, it features a concave bezel, scalloped lugs and rectangular pushers. Like all Patek Platinum watches, the case is discretely set with a diamond between the lugs at 6 o’clock.

The navy-blue dial features a textured center and black-gradient rim, which looks superb. The design looks very balanced and elegant while combining the chronograph and perpetual calendar indications. These remain highly legible to the point that they would almost “conceal” the complexity of the movement. The day, date, and month are placed around the upper portion of the dial, ensuring that the perpetual-calendar indications remain exceptionally clear and immediately legible. Day of the week is at 10–11 o’clock, date at 12 o’clock, month at 1–2 o’clock, leap year at 4 o’clock, and the day/night indication is at 8 o’clock inside the running seconds sub-dial. The moon phases indication is at 6 o’clock, and it won’t come as a surprise, the day and month are indicated in Italian, which makes sense for the Milano exhibition. At 3 o’clock is the 30-minute counter of the chronograph. Last but not least, the different textures, levels, and finishes add a pleasing sense of depth.

The Patek Philippe 5978P-010 chronograph and perpetual calendar limited-edition Milano 2026 is presented on a navy-blue composite strap. It is secured to the wrist by a platinum patented triple-blade fold-over clasp. The watch is released in a limited edition of 120 pieces. Price to be confirmed 

For more details, please visit www.patek.com.