Omega Diver 300M Seamaster Professional Black dial watch is equipped with a steel belt and has been upgraded to a see-through bottom full ceramic dial that is consistent with a date calender window at 6 0’clock. The scales and characters on the upgraded ceramic ring use “white enamel” The needle shape is enlarged and the reading is clearer. The strap and buckle are in all black. The Seamaster Professional by Omega Diver 300M Black watch buckle can adjust the length.