Complications
Patek’s catalog grouping for the annual calendar, world time, travel time, and perpetual calendar references that do not live inside the Calatrava or Nautilus lines. The Annual Calendar 5396 (cal. 324 S QA LU 24H) and Perpetual Calendar 5327 (cal. 240 Q) are the family’s two most-traded references; both run in the 38.5–39mm dress band on the in-house micro-rotor automatic platforms.