White Gold 1815 “Up/Down” by A. Lange & Söhne

The name of the 1815 UP/DOWN refers to the birth year of Ferdinand A. Lange and to the brand’s iconic UP/DOWN power-reserve indicator, a device first used in historic pocket watches and marine chronometers. It dates back to a Lange patent granted in 1879. Ref. # 234.026. 39mm case diameter.