A. Lange & Söhne is enriching its 1815 model family with a timepiece featuring one of the most sophisticated horological complications: The chronograph rattrapante. With the 1815 RATTRAPANTE, A. Lange & Söhne’s watchmakers yet again demonstrate their expertise in the field of short-time measurement. Its complex mechanism expands the functionality of a classic chronograph by allowing the measurement of a random number of lap times within a minute. For this purpose, the watch has two superposed chronograph hands, the centre chronograph hand and the centre rattrapante hand. Both hands start together when the pusher at 2 o’clock is actuated. The centre rattrapante hand can now be stopped independently of the centre chronograph hand and then resynchronised with it. This procedure, used for instance to measure lap times, can be repeated infinitely.