The A. Lange & Sohne Langematik Perpetual 310.026E features a 38.5mm 18k white gold case surrounding a black dial on a black alligator strap with an 18k white gold tang buckle. Functions include hours, minutes, small-seconds, day, date, month, perpetual calendar, moon phase and am/pm indicator. The watch also measures 10/5mm in thickness and 47.3mm from lug-to-lug.
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