With the 1815 Rattrapante Perpetual Calendar, premiered in 2013, A. Lange & Söhne endowed three of the most sophisticated horological complications with the beautifully classic design of the 1815 product family. The equally rare and challenging combination of a split-seconds chronograph with a perpetual calendar is now presented in a new livery, featuring an 18-carat white gold case with a pink-gold dial and limited to 100 pieces. It is the third timepiece from A. Lange & Söhne to boast a watch face with this hue, which is highly sought-after by collectors, and joins the existing executions in platinum and pink gold with an argenté dial. 

The rattrapante complication is considered to be one of the most ambitious in the world of high horology, since it is capable of measuring intermediate times and comparative times as well as determining minimum and maximum values in the course of one minute in addition to classic chronograph functions. As the balance wheel of the manufacture caliber L101.1 beats with six semi-oscillations per second, the stopped times can be recorded with an accuracy of one sixth of a second. Thanks to the additional graduation on the peripheral minute scale, these can be easily read.
While the rattrapante chronograph excels on the field of short-term measurement, the perpetual calendar is a long-distance champion. The complex mechanism ensures that the date, day of the week and month are correctly displayed ? every single day, d...