The A. Lange & Sohne Langematik Perpetual is encased in yellow gold surrounding a silver dial on a black alligator strap with a yellow gold tang buckle. Functions include hours, minutes, seconds, am/pm indicator, day, date, month, leap year indicator and moon phase indicator. Measurements include 38.5mm in case size (not counting crown or pushers), 10.6mm in thickness, and 47mm from lug-to-lug.
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