SIGNED A. LANGE & SÖHNE, DATOGRAPH PERPETUAL MODEL, REF. 410.025, CASE NO. 163'012, CIRCA 2008

Introduced at the SIHH in 2006, the Datograph Perpetual is A. Lange & Söhne's first wristwatch combining a chronograph and perpetual calendar. The timepiece features a flyback chronograph and precisely jumping minute counter that allows the chronograph to be reset and restarted instantaneously, as well as a perpetual calendar that remains accurate until the year 2100 when it has to be manually advanced by one day.

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.