For over ten years, the A. Lange & Söhne Datograph Up/Down has been the benchmark in chronographs since its launch. Its assets include the oversized date, the high-speed flyback switching mechanism for the chronograph and a patented, precisely-jumping minute counter. The Datograph Up/Down also features a power reserve indicator. Only available in 18K rose gold or platinum both with a black dial, the new Datograph —as it replaced the 39 mm model— is one of the most iconic Lange timepieces out there.