The 1815 Up/Down celebrates one of the oldest and most practical complications in precision watchmaking by incorporating a beautifully executed power reserve indicator into the classic 1815 design. Historically known as the “Auf/Ab” display, this mechanism informs the wearer whether the mainspring is fully wound or approaching depletion, ensuring the movement consistently operates within its optimal performance range. Its balanced dial preserves the collection’s signature Arabic numerals, railway minute track and traditional small seconds while introducing additional functionality with remarkable elegance.

At its heart is a meticulously hand-finished manufacture calibre developed entirely in Glashütte and assembled twice to achieve the exacting standards expected of A. Lange & Söhne. Through the sapphire caseback, collectors can admire untreated German silver plates, polished steel components, gold chatons, thermally blued screws and the Maison’s celebrated hand-engraved balance cock. The 1815 Up/Down seamlessly combines historical inspiration with practical everyday usability, making it one of the most admired manually wound timepieces within the manufacture’s contemporary catalogue.