40 mm

The new A. Lange & Sohne Richard Lange Referenzuhr model’s main selling point is the historical connotations that date back to the 19th century. A century before high-speed optical networks and atomic clocks, it was an era, when high-precision pocket watches were used to distribute the right time from the timekeeping service of the Mathematics and Physics Salon to public clocks at railway stations, and these sorts of installations where time was not just money, but also — safety.