Automatic movement, Calibre El Primero 4061 based on the classic Zenith 400 chronograph architecture with 31 Jewels and a power reserve of about 50 hours. Features luminous silver-tone hands and index hour markers, minute markers, tachymeter scale along the outer rim (open heart display), analog dial type displaying blue colour. Includes two sub-dials: one for elapsed time in 30 minutes format, another showing 12-hour chronograph function. Silver-tone stainless steel case with a black rubber strap band measuring 20 mm width and equipped with a deployment clasp. Features fixed bezel also constructed from silver-tone stainless steel material. Sapphire crystal provides excellent scratch resistance qualities against the dial. The round case measures 42 mm in diameter and has a thickness of 14.05 mm. Water resistant to depths up to 330 feet (equivalent to 100 meters). Luxury Swiss Made men's chronograph watch from the El Primero Chronomaster 1969 series functions include chronograph, tachymeter, hour, minute, second.