The Patek Philippe Annual Calendar Flyback Chronograph ref. 5905/1A-001 comes with a 'sunburst' green dial and an integrated steel bracelet for the first time in the reference's history. It is a sporty makeover of one of the most desirable annual calendar chronographs to exist - with a central chronograph that can be used to count the seconds, plus a patented Annual Calendar complication that needs only one adjustment a year.