The Lange Datograph is a luxury watch made by the German watch manufacturer A. Lange & Söhne. It was first introduced in 1999 and it is known for its chronograph function and its elegant design. The Datograph features a flyback chronograph, with a large date display, a power reserve indicator and a small seconds subdial. The watch is powered by a manually wound movement, which is crafted in-house by A. Lange & Söhne. The Lange Datograph collection includes various models, such as the Lange Datograph, Lange Datograph Up/Down, Lange Datograph Flyback, Lange Datograph Perpetual, Lange Datograph Lumen. Each model has its own unique features and complications, but all of them embody the brand's commitment to precision, craftsmanship, and attention to detail. The Lange Datograph is widely considered as one of the finest mechanical chronograph watches ever made.