Grand Seiko SBGA029 Spring Drive Diver Watch Seiko by wholesalewatches - January 3, 2016January 3, 20160 The Grand Seiko Spring Drive Diver SBGA029 is most certainly a high-end watch. This is an ultimate tool watch. Not so much in being amazingly durable, but rather, in its intense attention to detail, finishing, and technology, all in a relatively simple and straight forward case. Seiko has a very