The A. Lange & Sohne Langematik Perpetual (ref. 310.225) is the first automatic wrist watch with a perpetual calendar, large date, and “zero reset” mechanism that allows the calendar and moonphase subdials to be advanced individually and, with the push of a single button, collectively as well. The A. Lange & Sohne Langematik Perpetual features a mechanical automatic movement; silver dial with Lange's patented large date display; sapphire-crystal, transparent case back; and 38.5mm platinum case on a platinum bracelet.

Watch Model
Brand     A. Lange & Sohne
Series     Langematik Perpetual 38.5mm
Size     Mens
Model No.     310.225
Alt. Model No.     310225
Watch Case Specs
Case Shape     Round
Case Dimensions     38.5mm
Case Thickness     10.2mm
Watch Case
Case Material     Platinum
Dial Color     Rhodium
Crystal     Scratch Resistant Sapphire
Bezel     Fixed
Screw-in crown     No
Case Back     Transparent
Movement
Movement     Automatic
Complications     Moonphase
Watch band and buckle
Band Material     Platinum
Color/Finish     Brushed & Polished
Clasp     Tang Buckle

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