Purchased in March 2009 this platinum ref 5960 is in truly immaculate unworn condition! It is the first Patek wristwatch to feature a self-winding chronograph movement with Annual Calendar function. The 40.5mm solid platinum case houses the Patek caliber CH 28-520 movement with a power reserve of 55hrs. The Anthracite dial displays the day, date & month and has a power reserve indicator beneath the date aperture. The chronograph monocounter also has a day/night indicator which progressively changes colour from white (day) to blue (night). Original box, Patek Philippe certificate, instructions and stylus. Guaranteed by Watch Club for 2 years.