The perpetual calendar designed in the early 1980s by Kurt Klaus comprises around 80 parts and independently recognizes the various lengths of the months and leap years. It will require no readjustment until 2100. The date, day, month, moon phase and year displays are perfectly synchronized with each other. If the watch has not been worn for some time, it can be reset merely by turning the crown. The IWC-manufactured 89630 calibre combines the perpetual calendar with a chronograph function. The calendar's moon phase display is integrated with the chronograph totalizer at "12 o'clock". This complicated Pilot's Watch is housed in an 18-carat 5N gold case. The special edition designed to honour "Le Petit Prince" features the typical midnight blue dial and is limited to just 250 watches.
18 ct 5N gold case Diameter 43.0 mm Height 15.9 mm Screw in crown See-through sapphire glass back Water resistance 6 bar
89630 Calibre IWC-manufactured movement Automatic, self-winding 68 hours Power Reserve Frequency 28800.0 vph (4.0 hz) 399 Components 51 Jewels Côtes de Genève, perlage
Perpetual calendar with displays for the date, day, month, year in four digits and perpetual moon phase Chronograph function with hours, minutes and seconds Hour and minute counters combined in a totalizer at 12 o’clock Flyback function Glass secured against displacement by drop in air pressure Sapphire glass, convex, antireflective coating on both sides Rotor in 18-carat 5N gold Small hacking seconds Limited to 250 pieces
Blue dial with luminescence
Brown Calfskin Strap Strap width 21 mm