full perpetual calendar showing the year in an aperture; the moon’s age and phases; a split-seconds chronograph; and a second time-zone. The reverse shows astronomical indications, with sidereal time, equation of time, times of sunrise and sunset, display of the seasons, equinoxes and solstices, and the signs of the zodiac, together with a rotating celestial chart. Acoustic indications offer grande and petite sonnerie; a minute repeater which chimes on four gongs; and an alarm on the fifth gong. Swiss patents are awarded for the date of Easter indication, which varies according to the ecclesiastical calendar, and for the secular perpetual calendar with retrograde date indication, displaying the day’s date based on a cycle of four hundred years, and requiring no adjustment until the 28th century.
1 of 4 (Patek holding a fifth prototype) Christie's thinks it'll sell for $11,000,000. Personally I think higher. I wonder what the best way to properly display such a thing would be, like what does the owner plan on doing with it? Need a rotating shrine in the middle of a watch temple or something.