Spring Drive is a unique watch movement technology developed by Seiko, combining the traditional mainspring power source with an innovative electronic regulator. Unlike conventional mechanical movements that rely solely on gears and escapements, Spring Drive incorporates a Tri-synchro regulator, which uses electromagnetic energy to control the unwinding of the mainspring. This results in a highly accurate timekeeping mechanism with a precision of ±1 second per day, surpassing most mechanical watches.

The Spring Drive movement is characterized by its smooth, continuous sweeping second hand, a distinctive feature that sets it apart from the ticking motion of traditional mechanical watches. This is achieved through the glide wheel, which rotates in one direction, eliminating the need for a traditional escapement. The movement is also known for its durability and low maintenance, as it lacks the friction and wear associated with mechanical escapements.

Introduced in 1999, Spring Drive represents a significant innovation in horology, blending the craftsmanship of mechanical watchmaking with the precision of electronic regulation. It is used in various Seiko collections, including the luxury Grand Seiko line, offering watch enthusiasts a unique combination of traditional aesthetics and cutting-edge technology.