Stainless steel case with a stainless steel bracelet. Fixed stainless steel bezel. Black (open heart) dial with luminous silver-tone hands and index hour markers. Minute markers. Tachymeter markings around the outer rim. Dial Type: Analog. Luminescent hands and markers. Chronograph - two sub-dials displaying: 12 hour and 30 minute. Zenith calibre El Primero 4061 automatic movement, based upon Zenith El Primero 400, containing 31 Jewels, composed of 282 parts, bitting at 36000 vph, and has a power reserve of approximately 50 hours. Scratch resistant sapphire crystal. Pull / push crown. Transparent case back. Round case shape. Case size: 42 mm. Case thickness: 14.05 mm. Band width: 21 mm. Deployment clasp with a push button release. Water resistant at 100 meters / 330 feet. Functions: chronograph, column wheel, hour, minute, small second, tachymeter. El Primero Series. Luxury watch style. Watch label: Swiss Made. Zenith El Primero Chronomaster Automatic Open Heart Black Dial Mens Watch 03.2040.4061/21.M2040.
