The Seiko 5619A watch movement, introduced in 1952 and featuring an automatic mechanism, employs an early fixed stud carrier that later transitioned to a mobile design. Throughout its production period, different rotor shapes were utilized, and similarities can be observed with other calibers in the same family. In addition to its automatic feature, the movement includes a sweep second hand and a date function that can be set by adjusting the 21-24 hour range. This movement has been in use since 1952.