The Citizen EA1604 watch movement is a selfwinding chronograph movement that encompasses a range of functions. These include central hours and minutes, a central chronograph seconds hand for measuring time intervals, a small running seconds subdial located at 6 o'clock, a 30-minute chronograph counter positioned at 3 o'clock, a 12-hour chronograph counter located at 9 o'clock, and a double-digit big date display situated at 12 o'clock.