SIGNED A. LANGE & SÖHNE, DATOGRAPH PERPETUAL MODEL, REF. 410.032E, MOVEMENT NO. 62'443, CASE NO. 176'916, CIRCA 2013

Introduced at SIHH in 2006, The Saxonia Datograph Perpetual is A. Lange & Söhne's first wristwatch combining a chronograph and perpetual calendar. The watch features a flyback chronograph and precise jumping minute counter that allows the chronograph to be reset and restarted instantaneously. On top of the flyback chronograph, this complicated and impressive timepiece covets a perpetual calendar with leap years indication and will remain accurate- as long as it continuously runs until the year 2100 when it has to be manually advanced by one day. Ingeniously, the outsized date dominates the upper half of the dial for legibility, and all calendar functions can be quickly and synchronously advanced via the pusher at 10 o'clock.

Turning the watch over, the in-house cal. L925.1 is displayed through a sapphire crystal caseback revealing its delicate hand-finished components comprised of 556 individual parts. The hand-finished components are executed to the highest level.