42mm steel case, 12mm thick, transparent sapphire glass back with oscillating weight, côtes de genève pattern, steel bezel, domed sapphire glass crystal with anti-reflection treatment on both sides, black sunray dial hour-markers and hands faceted, set with diamonds and rhodium-plated, el primero 400 b automatic movement with hours and minutes in the center, small seconds hand at 9 o'clock, date indication at 6 o'clock, 3-counter chronograph: central chronograph hand, 30-minute counter at 3 'clock, 12-hour counter at 6 o'clock, approximately 50 hours of power reserve, black alligator leather strap with protective rubber lining, triple folding clasp buckle. Water resistant to 5 atm.