Patek Philippe Nautilus Travel Time Chronograph Ref. 5990/1A-001 The Patek Philippe Nautilus Travel Time Chronograph ref. 5990/1A-001 pairs a flyback chronograph with a second time zone, set by pushers on the left of the case, with day/night indicators for local and home time. Its embossed dial shades to black. The reference is no longer part of Patek Philippe's collection. - Self-winding Calibre CH 28-520 C FUS - Flyback chronograph; second time zone with local and home day/night indicators - Date - 40.5 mm steel case, water resistant to 120 metres - Integrated steel bracelet with Nautilus fold-over clasp Full set. Maker: Patek Philippe. Reference: 5990/1A-001. Available through ELITA's private desk — verification review, discreet handling and storage. Price on request.