Almost impossibly slim, this ultra-thin Breguet perpetual calendar is one of the most discreet grand complications ever made! The 18ct yellow gold case with French-fluted centre measures only 8.5mm high yet still houses an automatic movement capable of keeping track of the moonphase, month, day, date and leap year, needing correction only once every 100 years. Supplied with the special gold setting stylus (reminiscent of Breguets original pocket watch chain and key) and presented with its original Breguet box and certificate.