Frédérique Constant Perpetual Calendar (2016)

A perpetual calendar can recognise leap year, different days in a month and hence you don’t need to set the watch if you keep it running.  Stainless case in 42mm with a thickness of 10.2mm.  Automatic in house FC755 calibre, with moonphase, power reserve is 38 hours.  Priced at USD 9000