Stainless steel case with a black rubber strap. Fixed stainless steel bezel. Black dial with silver-tone hands and Arabic numeral hour markers. Arabic numeral minute markers (at 5 minute intervals). Minute markers around the outer rim. Dial Type: Analog. Date display between the 4 and 5 o'clock positions. Chronograph - two sub-dials displaying: 60 second and 30 minute. El Primero 4002 automatic movement with a 50-hour power reserve. Scratch resistant sapphire crystal. Pull / push crown. Transparent case back. Round case shape. Case size: 37.5 mm. Case thickness: 13.5 mm. Band width: 18 mm. Deployment clasp. Water resistant at 30 meters / 100 feet. Functions: chronograph, date, hour, minute, second. El Primero Chronomaster Star Series. Luxury watch style. Zenith El Primero Chronomaster Star Chronograph Automatic Black Dial Watch 03.1230.4002/21.C509.
