Patek Philippe has used its Watch Art Grand Exhibition in Milan to introduce Ref. 5978P-010, a platinum chronograph that combines the manufacture’s hand-wound chronograph architecture with an instantaneous perpetual calendar for the first time. The 42mm watch is limited to 120 pieces and debuts the new Caliber CH 29-535 PS QI, a 500-component movement built specifically around that complication pairing.
Instead of letting the calendar indications creep over independently around midnight, the mechanism changes the day, date, month, and leap-year display essentially at once. Those calendar indications sit in an arc across the upper half of the navy sunburst dial, with Italian-language markings reinforcing the Milan connection. The center of the dial receives additional texture, while a black gradient around the perimeter gives the otherwise classical complication a more contemporary, sport-oriented presentation.
The case is platinum and the watch is supplied on a matching composite-material strap, an unusual choice that further distances it from the formal language associated with many Patek perpetual calendars. The result sits alongside recent technical pieces such as the Grand Complications 5322G alarm watch but attacks complexity from a different direction: synchronization rather than adding another standalone indication.
Patek Philippe is producing only 120 examples of Ref. 5978P-010 for the Milan exhibition. U.S. list pricing is $337,585, and allocation is expected to be exceptionally limited.
