Silver-tone stainless steel case, blue nylon strap. Fixed silver-tone bezel. Blue open heart dial with luminous hands and index hour markers. Minute markers present. Tachymeter scale on the outer rim. Analog dial type. Luminescent coated hour markers and hands. Chronograph movement featuring two sub-dials: one for 12 hours, one for minutes elapsed. Automatic winding Zenith Calibre El Primero 4061 (derived from El Primero 400) movement with 31 jewels, consisting of 282 parts; beating at 36000 vph; power reserve around 50 hours. Scratch resistant sapphire crystal lens. Pull/push crown for setting time and functions. Transparent case back revealing the automatic movement. Round shaped case measuring 42 mm in diameter with a thickness of approximately 14.05 mm. Band width is 21 mm. Butterfly clasp closure activated by push button release mechanism. Water resistant to 100 meters (approx. 330 feet). Functions: chronograph stop-start, hour hand, minute hand, small second sub-dial. Belongs to the El Primero collection. Swiss made label. Luxury analog wristwatch.