HOROLOGICAL MASTERPIECE WITH TWO COMPLICATIONS.

During the development phase, the off-centre, non-overlapping dial layout of the LANGE 1 provided optimal prerequisites for the harmonious integration of a perpetual calendar outside the hour and minute circles. The months are indicated on a peripheral ring so that outstanding legibility of all displays can consistently be achieved. This exceptional timepiece merits a movement assuring the utmost in precision. For this reason, it is endowed with a tourbillon, another sophisticated complication. Its exact workings can only be observed through the sapphire-crystal caseback on the reverse of the watch because, in the interest of clarity, the dial aperture was omitted.

CONCISE LAYOUT FOR SUPERB LEGIBILITY.

Despite the numerous indications, the dial is lucid and well-organised. All calendar indications – and for the first time in a Lange watch, the outsize date as well – and the moon-phase display switch instantaneously to produce unambiguous readings at all times. An applied arrow marker located on the lower rim of the dial indicates the current month on the peripheral ring. All calendar displays can be separately corrected or collectively advanced in one-day increments with recessed push pieces. Mathematically, the calendar mechanism only has to be corrected by one day in the year 2100.