When the Patek Philippe Annual Calendar arrived in 1996 as the reference 5035, it created an entirely new class of complication. The mechanism — invented and patented by Patek — displays the day, date and month, and automatically distinguishes 30- and 31-day months. It needs a single manual correction each year at the end of February, because it does not "know" February's short length. That placed it neatly between a simple date and a perpetual calendar: both useful and far more accessible.
The annual calendar quickly became a Patek signature. The 5035 was followed by the 5146, which added a power-reserve indicator and moonphase and stayed in production for many years as a collection staple. The 5396, launched in 2011, presented the day, date and month through balanced apertures with a moonphase, becoming a favourite "first Patek" for many collectors. The 5205 added a day/night indicator, while the 5235 explored a different aesthetic with a regulator dial.
The complication's scope kept widening. The 5905, introduced in 2015, combined a flyback chronograph with the annual calendar in a single sporty-elegant case, while the 4947 brought the complication to Patek's ladies' collection. Across every reference the idea stayed the same: high horology that asks the least of its owner day to day. Today the annual calendar sits at the heart of the Patek catalogue, between the classical restraint of the Calatrava and the complexity of the grand complications.
For Patek Philippe Annual Calendar buyers in Turkey — searching annual calendar price, 5396 or 5146 pre-owned, or Patek complications — Bedesten Watches in Suadiye, Istanbul offers a rotating inventory of references including the 5035, 5146, 5396, 5205 and 5905.