Patek Philippe Nautilus Travel Time Chronograph 5990/1A-001. 40.5mm steel case which is water resistant to 120 metres. Black graduated dial with gold applied hour markers with luminescent coating. Patek Philippe CH 28-520 C FUS self winding movement, 28,800vph, 34 jewels, 370 parts and a power reserve of 45 – 55 hours. Functions: Chronograph with 60 minute counter. Dual time zone mechanism indicating local and home time. Local and home day/night indication. Steel bracelet with Nautilus folding clasp. See through sapphire case back. Box and papers dated August 2017.