Patek Philippe 5978P: The Seventh Perpetual Calendar Chronograph
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Patek Philippe has introduced the Ref. 5978P-010 at its Watch Art Grand Exhibition in Milan, marking only the seventh new manually wound perpetual-calendar chronograph in the maison’s history. The sequence began with the Ref. 1518 in 1941 and continued with the 2499, 3970, 5020, 5970 and 5270.
A perpetual calendar automatically accounts for the different lengths of months and leap years, while a chronograph measures elapsed time. Combining the two has been a defining Patek Philippe complication since the 1518. The 5978P introduces a significant technical change: its new manually wound CH 29-535 PS QI calibre combines the chronograph with an instantaneous perpetual calendar for the first time.
The calendar indications jump simultaneously rather than advancing progressively. They appear through apertures for the day, date, month, leap year and day/night indication, arranged across the upper portion of the dial. The 500-component movement also incorporates a moon-phase display and instantaneous 30-minute counter. Its power reserve is 55 to 65 hours with the chronograph disengaged.
The 5978P-010 has a 42 mm polished platinum case, a textured sunburst navy-blue dial and Italian calendar indications. A navy composite strap with a fabric pattern and red stitching completes the Milan-specific design. The caseback carries the inscription “Patek Philippe Milano 2026”. Production is limited to 120 pieces.
Patek Philippe lists the official US price at $337,585. The Milan Watch Art Grand Exhibition runs from 2 to 18 October 2026 at CityOval, CityLife, with free public admission by registration.
For collectors, the significance lies less in the Milan decoration than in the reference’s position within a lineage that has appeared only seven times in 85 years. The 5978P changes the architecture of that familiar complication while retaining the manual-winding chronograph at its centre.
