Graham’s Silverstone Stowe GMT Tracklighted Limited Edition 250 Written byWatchTimeJune 11, 2012 Graham has announced the Silverstone Stowe GMT Tracklighted Limited Edition, which will be limited to 250 pieces. It is powered by Graham’s bi-compax chronograph movement, with a 48-hour power reserve. This motor sports-themed watch also features an integrated black tire tread rubber strap. The watch will be available in the coming months, for $11,550. Silverstone Stowe GMT Tracklighted Limited Edition 250