Spring Drive is a unique watch technology. It generates energy like every other luxury mechanical watch but combines this with an electronic regulator to deliver a level of precision that no mechanical watch can match. The development of Spring Drive was possible because Grand Seiko is one of the very few manufacturers with mastery of both electronic and mechanical watchmaking.
Spring Drive is powered by a mainspring, just like all other mechanical watches. This traditional way of generating power allows the watch to be entirely autonomous, with no need for a battery or other power source. Winding the mainspring by turning the crown or by moving the wrist stores energy which is then transferred to gears and used to move the watch hands as the spring unwinds over time.
By taking advantage of the high level of torque afforded by the mainspring, the caliber needs no other power to move the long, wide hands in the smooth glide motion that is Spring Drive’s signature.
Object nr: 93
Maker: Grand Seiko
Model: Grand Seiko Spring Drive GMT
Movement: Cal 9R66A, Serie nr. 680013
Material: Stainless steel, crystal back
Original crown: Yes
Dimensions: 41mm, without crown
Strap/Bracelet: Original bracelet Ref nr. D252-B-F
Lug Width: 20 mm
Box/Papers: Yes, full set! Boxes and papers
Serviced: Warranty until 21-10-16
Seiko warranty until 21-10-16
This Grand Seiko is amazing. Its hard to describe. Grand Seiko got it all - the finish, the movement and the outstanding bracelet. Our Grand Seiko is in a very good condition - it got some small signs of wear but still is marvelous. The case is untouched, the braclet is tight and the dial is like new. We hope that the photo of this watch speaks for itself.
The pictures is a part of the description, study therefore the pictures carefully!
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