| Size | - Diameter: 39.0 millimeters - Height: 8.7 millimeters |
|---|---|
| Movement | |
| Case & Bezel | Up / Down |
| Bracelet | |
| Dial | - Hours and minutes; - subsidiary seconds dial with stop seconds; - UP/DOWN power-reserve indicator, 72 hours power reserve |
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.
