BRAND : Patek Philippe MODEL : Nautilus MODEL NUMBER : 5711/1A-018 WATCH : Self-winding mechanical movement. Caliber : 26‑330 S C. Date in an aperture. Center sweep second hand. DIAL : Dial: Tiffany-Blue CASE : Stainless steel. Screw-down crown. Sapphire-crystal case back. Water resistant : 120 m