A. Lange & Sohne watchesA. Lange & Sohne has produced a grand complication watch that took seven years to design. In 2013 the watch was released. Only one watch will be produced each year over the next six years for a total of six worldwide. The watch comes complete with grand and petite sonnerie, minute repeater, split-seconds monopusher chronograph and perpetual calendar with moonphases. This exquisite watch takes one individual watchmaker one complete year to complete the piece. The watch is made up of 876 individual components. The perpetual calendar will correctly display the date until 2100 without adjustment. The case is rose gold and measures 50mm (diameter) and 20.3mm (height).