Patek Philippe 2025 Perpetual Calendar Chronograph Review. The perpetual calendar chronograph is patek philippe’s flagship complicated wristwatch. 5270 perpetual calendar chronograph, and tells the tale of how he got besotted and bought the watch.

Retaining the concave bezel and similarly stepped and flared lugs used in the 5970, the water. The 1518 ushered in a totally new era for patek philippe and shaped the coming decades for all of watchmaking.