A. Lange & Sohne [ah LANG-eh unt ZURN-neh] takes pride in creating matchless complications with Swiss quality and German heritage. The premiere watch maker’s 2013 debuts include the 1815 Rattrapante Perpetual Calendar watch. If it sounds complicated, it is. The transparent case back reveals a beautifully complex mechanical movement which supports the chronograph’s different functions. On the top side, the solid silver dial is a well-designed maze of hours and minutes, perpetual calendar with date, day, month and leap-year display. For the first time, A. Lange & Sohne ditched its oversized date indicator in favor of a more classic-looking date subdial. Down at six o’clock is the watch’s moonphase indicator. All these intricacies, however, are secondary to the model’s most prominent feature – the Rattrapante or split-second function. The Rattrapante chronograph allows double split-second timing, manipulated by a convenient push-button at 10 o’clock. The 1815 Rattrapante mechanism is housed in an elegant gold or platinum case and leather straps. Shreve & Co. at Palo Alto is an authorized dealer of 1815 A. Lange and Sohne timepieces.

 

 

Reference: http://www.alange-soehne.com/timepieces/debuts-2013/#1815-rattrapante-perpetual-calendar/introduction