If there is one watch with a face of its own, it is Jaeger-LeCoultre's Reverso. Always recognisable by its distinctive flip-over case, once devised to protect the watch from the rigours of a rough game of polo.
11 COMPLICATIONS
That own face is now quadrupled in this most complicated Revers ever, the Hybris Mechanica Calibre 185 Quadriptyque, the result of more than six years of development. But then you get something, namely the world's first watch with no less than four separate and functioning dials, with no less than 11 complications in total. Dial 1: hours, minutes, tourbillon (showing the seconds), perpetual calendar, large date, day, month, leap year, night & day indication.
CALIBRE 185
Dial 2: jumping digital hours, minutes, minutes repetition. Dial 3: lunar phase northern hemisphere, draconic lunar cycle (height of the moon), anomalous lunar cycle (apogee and perigee), month, year. Dial 4: moon phase southern hemisphere. All this is powered by a single movement, Jaeger-LeCoultre Calibre 185, which you have to wind manually and has 50 hours of power reserve. There is one but: make sure the watch's case is closed around midnight. That's because that's when ingenious mechanics take care of controlling dials 3 and 4, so you can flawlessly predict the coming supermen and eclipses again tomorrow. Indeed, as long as it ticks along quietly and the mechanics can do their work undisturbed, the moon phase display of this Quadriptyque only requires correction after 1111 years. Only 10 watches will be built.