18ct white gold Patek Philippe Chronograph 5170G-001. Chronograph with central chronograph hand and 30-minute elapsed time counter. Hand wound mechanical movement 39.4mm case diameter. Caliber CH 29-535-PS. Water resistant to 30m. Silvery White dial with gold applied numerals. Seconds sub dial. Black alligator strap with fold over clasp. Box and papers dated June 2013. UK papers Our reference S19400.