Patek Philippe Perpetual Calendar Chronograph Ref. 2025. Born in 2011, the ref. The day, date and month appear in a large single.

5270 are the two most highly regarded perpetual calendar chronograph timepieces currently in. The perpetual calendar displays are harmoniously arranged, with the date indicated by a hand and a moon phase at 6 o’clock, as well as a twin day/month aperture at 12 o’clock,.