The seiko ananta spring drive chronograph brags to be the only luxury chronograph that manages to measure elapsed time precisely as its name suggests the watch makes use of seikos breakthrough spring drive technology this timepiece is equipped with 5r86 calibre that has 50 bearing jewels one amazing fact about the spring drive chronograph is that 416 pieces are used in its making for convenience it features a 72 hour power reserve a date window is positioned conveniently at the 3 ocloc