Patek Philippe Unveils Instantaneous Perpetual Calendar Chronograph at Milan Exhibition

Key points

• The Reference 5978P is the seventh perpetual calendar chronograph in Patek Philippe’s 187-year history, limited to 120 pieces for the Milan market.
• It utilizes the new caliber CH 29-535 PS QI, which combines a column-wheel chronograph with an instantaneous perpetual calendar mechanism.
• The watch features a 42mm platinum case with a navy blue sunburst dial, black gradient rim, and a composite strap with Italian tricolor stitching.
• Priced at €320,757 (approx. $360,000), it is significantly more expensive than the current 5270P perpetual calendar chronograph.
• The release is part of seven Italian-exclusive limited editions unveiled at the seventh Watch Art Grand Exhibition in Milan.

Background

Patek Philippe has historically released perpetual calendar chronographs infrequently, with previous models including the 1518, 2499, 3970, 5020, 5970, and 5270. The brand recently updated the dials of the 5270P earlier in 2026. The Milan exhibition is the seventh in a series of large-scale events that began in Dubai in 2012, with previous stops in Munich, London, New York, Singapore, and Tokyo. These exhibitions have collectively attracted over 225,000 visitors.

How outlets are covering it

Hodinkee emphasizes the technical novelty of the 5978P, noting it is the first Patek Philippe watch to feature both an instantaneous chronograph minute counter and an instantaneous calendar mechanism. Hodinkee also highlights the sporty aesthetic, including the Calatrava-style case and composite strap, while critiquing the 42mm diameter as potentially too large for some wearers. Fratello Watches provides a broader context of the Milan exhibition, detailing the seven Italian-exclusive releases, including minute repeaters and world time models, and notes that Patek Philippe President Thierry Stern’s favorite was the red-dial Minute Repeater ref. 7047G-010. Monochrome Watches covered a different Milan-exclusive, the Aquanaut 5167A, but did not provide detailed analysis of the 5978P in the provided text. Hodinkee notes that A. Lange & Söhne had previously achieved similar instantaneous complications with its Datograph Perpetual Tourbillon, but that model is no longer in production.

Why it matters

The launch of the Reference 5978P signals a new direction for Patek Philippe’s complicated watch lineup, integrating advanced instantaneous mechanisms into a more sporty and accessible design. The high price point and limited availability underscore the brand’s strategy of creating exclusive, high-value pieces for key markets. The Milan exhibition’s success, with over 45,000 registered attendees, highlights the growing importance of regional markets in luxury watchmaking.

What to watch

Patek Philippe has not announced plans to make the 5978P available outside Italy or in a non-limited edition, but Hodinkee suggests it may join the wider catalog in the future. The brand will likely showcase further developments of the new caliber at Watches and Wonders 2027. The Milan exhibition runs until October 18, 2026, with free admission for registered attendees.