Patek Philippe Perpetual Calendar Chronograph, Model # 5970G. 18kt white gold 40mm case with a crocodile leather strap and 18k white gold deploy buckle. Manual wind movement. AM/PM indicator, hours, minutes, seconds, date, day, leap year, month, moonphase and chronograph functions. Perpetual calendar – watch will correctly adjust for short and long months as well as 28/29 days of February once every 4 years. This watch is in superb mint condition and comes to you with original box and papers.