El Primero Caliber 4021SC, assembled with 248 components, beats at 36,000 vph with an approximate 55 hour s power reserve in stainless steel case 46.5mm. Chronograph function. Scratch Resistant Sapphire Crystal. Exhibition Sapphire Crystal Caseback. Power Reserve Indicator. Original Brown rubber strap with Tang buckle. Water resistant at 300 meters (1000 feet). BOX & CERT DATED 2011.