Mechanical movement. Automatic winding. Calibre CVSTOS 551. Hour, minute, second, large date, second time-zone. Characteristics: Instantaneous date change. Power-reserve 42 hours. 21 Jewels. Rotor Exclusive CVSTOS 888 Palladium alloy and titanium grade 5. Frequency 28,800 vibrations per hour. Water resistant up to 100 mt.