The name of the 1815 RATTRAPANTE PERPETUAL CALENDAR refers to the birth year of Ferdinand A. Lange. It unites two refined classic complications: a split-seconds chronograph and a perpetual calendar.
Hours and minutes; subsidiary seconds dial with stop seconds; rattrapante chronograph with minute counter; perpetual calendar with date, day-of-week, month and leap-year display; moon-phase display; UP/DOWN power-reserve indicator. 42 hours power reserve
Diameter: 41.9 millimetres; height: 14.7 millimetres