The Seiko Spring Drive, first shown in 1999, is a movement technology that combines a mechanical mainspring with a quartz-controlled regulator. Instead of an escapement, a glide wheel and an electromagnetic brake regulate the gear train, which gives a seconds hand that sweeps smoothly. Seiko rates early Spring Drive movements at about one second a day. It is a movement family used across many cases, not one single reference.

Development began in the 1970s and took more than two decades; the movement is powered entirely by the mainspring, with no battery. The first watches went on sale in Japan around 1999, with wider release after 2004, and the technology was later used in Grand Seiko and Credor watches.

The community values Spring Drive as one of the more original modern mechanisms and a signature of Grand Seiko, though some purists object to the quartz component. The technology is still in production.