Automatic mechanical movement, Calibre El Primero 3604. Analog dial displaying hours, minutes and seconds via central hands and minute sub-dials. Black dial with silver-tone applied hour markers and luminous coating on hands and markers for enhanced legibility in low light. Three sub-dials: one measuring tenths of a second (innermost), one measuring 1/60th minute, one measuring hours past twelve. Silver-tone steel baton hands. Scratch resistant sapphire crystal lens. Fixed bezel with silver-tone steel insert. Screw-down winding/crown and case back (transparent). Round stainless steel case in matte or polished finish depending on model details provided. Deployant folding clasp closure mechanism. Water resistant up to 100 meters / 330 feet, suitable for swimming. Swiss Made watch label. Dress style chronograph intended for formal wear.