Located at “12 o’clock” on the dial, IWC’s annual calendar shows the month, date and day in three separate windows. The mechanism automatically takes into account the differing lengths of individual months. Unlike a perpetual calendar, however, the annual calendar is unable to make allowance for the leap days in February or the leap years. Once a year, then, at the end of February, it requires manual correction. In the case of IWC’s annual calendar, the correction is made simply, via the crown. The hour wheel sets in motion the date advance wheel, which is equipped with two different advance fingers. One of the fingers is responsible for the date and month displays, the other for the weekday.
Automatic Caliber 52850
44.20 X 15.30 MM
Blue Dial with Silvered Numerals
Silvered Sword-Shaped Hands
|Strap and Buckle|
Alligator Strap & Folding Clasp
Two-Year Manufacture Warranty
Hours, Minutes, Subsidiary Seconds Hand Dial, Month Display, Date Display, Day Display, Annual Calendar, Power Reserve Indicator
Breguet Manufactured Hairspring. Glucydur Beryllium Alloy Indexless Balance with High-Precision Adjustment Screws on Balance Rim.