Patek Philippe, Genève, "Nautilus", Ref. 3800/001, circa 1990. 18k gold wristwatch "Nautilus" with centre seconds and date, 18k Patek Philippe gold bracelet. Cal. 335 SC, extra-thin 18k gold rotorwind automatic movement, Gyromax balance. Water-resistant 120m. 37 x 33 mm，thickness 7.7 mm.