Annual-calendar watches
References in the Grail Atlas catalog carrying the annual-calendar complication.
An annual calendar tracks day, date, and month, automatically adjusting for 30- and 31-day months but requiring a single manual correction on March 1st (after February). Patek Philippe patented the modern annual calendar in 1996 — a remarkable late entry into traditional horology — and the complication has since become the practical mid-tier alternative to the perpetual calendar.
What to look for
Patek Philippe 5396 (the canonical reference, multiple dial variants including the 5396G "Wempe" blue) and 5235 are the bench. Audemars Piguet's Code 11.59 Annual Calendar and the Royal Oak Annual Calendar 26573 carry the complication into the brand's more contemporary cases. IWC's Portugieser Annual Calendar 5035 uses a three-aperture top display that reads cleanly. Decide whether you want a sub-dial layout (Patek 5396) or a window display (IWC 5035) — both are correct readings, the choice is visual. The big shopping advantage of an annual over a perpetual: one correction a year, much cheaper service, no leap-year programming to maintain.