Patek Philippe Annual Calendar Chronograph 5960P

Patek Philippe Calendario annuale cronografo

The new chronograph caliber CH 28-520 IRM QA 24H is a self-winding mechanical movement with a column-wheel chronograph featuring a flyback function, power reserve indication, annual calendar, and day/night indicator. It beats at a frequency of 28,800 vibrations per hour (4 Hertz) – ensuring exceptional rate stability and a remarkably consistent balance amplitude – and is wound by a unidirectional central rotor in 21-karat gold. Like all Patek Philippe mechanical movements, it boasts the prestigious Hallmark of Geneva.