Patek Philippe Perpetual Calendar, Retrograde Date Ref. 5496R-001 The Patek Philippe ref. 5496R-001 is the rose-gold version, introduced in 2015, of the 5496 perpetual calendar with retrograde date. It shows day, month, leap year and moon phase with centre seconds in a 39.5 mm case. The reference is no longer part of Patek Philippe's collection. - Self-winding Calibre 324 S QR - Perpetual calendar with retrograde date, day, month, leap year, moon phase - Centre seconds - 39.5 mm rose-gold case - Alligator strap with rose-gold deployant clasp Full set. Maker: Patek Philippe. Reference: 5496R-001. Available through ELITA's private desk — verification review, discreet handling and storage. Price on request.