Patek Philippe Annual Calendar Chronograph Ref. 5960/1A-001 The Patek Philippe ref. 5960/1A-001, introduced at Baselworld 2014, is the annual calendar flyback chronograph in steel on a steel bracelet, with a silvery-grey dial accented in red and blue. The steel model was produced for about four years and is no longer part of Patek Philippe's collection. - Self-winding Calibre CH 28-520 IRM QA 24H - Flyback chronograph - Annual calendar - 40.5 mm steel case - Steel bracelet Full set. Maker: Patek Philippe. Reference: 5960/1A-001. Available through ELITA's private desk — verification review, discreet handling and storage. Price on request.