Patek Philippe Annual Calendar Flyback Chronograph Ref. 5905P-001 The Patek Philippe ref. 5905P-001, introduced at Baselworld 2015, combines an annual calendar with a flyback chronograph in a 42 mm platinum case with a blue dial. It was discontinued in 2022. - Self-winding Calibre CH 28-520 QA 24H - Flyback chronograph with 60-minute counter - Annual calendar - 42 mm platinum case - Blue dial; alligator strap Full set. Maker: Patek Philippe. Reference: 5905P-001. Available through ELITA's private desk — verification review, discreet handling and storage. Price on request.