Rolex Day-Date model 128238-0088 is an automatic mechanical movement watch powered by the Calibre 3255 movement, featuring a 31-jewel system and beating at 28,800 vph. It has approximately 70 hours power reserve, scratch-resistant sapphire crystal glass, water resistance to 100 meters (330 feet), screw-down crown resistant to shocks and magnetic fields, and is marked as Swiss Made.