Grand Seiko Spring Drive Chronograph Black Ceramic Edition Seiko by wholesalewatches - June 1, 20160 At Baselworld 2016, Seiko have announced a tourbillon from their Credor collection (review forthcoming), but the mainstay of their products are three hand watches, with the odd GMT. The SGBC003 Spring Drive Chronograph was introduced in 2007 and is an in-house developed column wheel chronograph with the Caliber 9R86. The