CIRCA: 2010
DIAMETER: 38.5 mm.
STRAP MATERIAL: Black A. Lange & Söhne CROCODILE strap
DIAL: Silvered
MOVEMENT: Automatic
FUNCTIONS: Perpetual calendar, leap year indication and moon phases
BUCKLE: Platinum A. Lange & Söhne buckle
WITH: A. Lange & Söhne Certificate of Guarantee dated November 2010, product literature, leather folder, winder, presentation box, setting pin, and outer packaging

ΨThis endangered species strap is shown for display purposes only and is not for sale. Upon sale, this watch will be supplied to the buyer with a black leather strap.

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Lot Essay

The Langematik Perpetual is the world's first automatic wristwatch featuring a perpetual calendar, an oversized date and the patented zero reset mechanism allowing the calendar displays as well as the moon phase indication to be advanced either individually or collectively by depressing the calendar change button in the band.

Once correctly set, the date display remains accurate until the next secular year occurs. The moon phase mechanism is also stunningly accurate: after 122.6 years of uninterrupted operation, it deviates from synodic lunation by merely one day.

Lange's patented "zero-reset" mechanism simplifies the synchronization of the watch with a time signal. When the crown is pulled out, it automatically causes the seconds hand to jump to the 12 o'clock or "zero" position.

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