The Seiko “Sumo”, a crowd favourite, cult classic, and underrated value proposition since its 2007 debut is back, upgraded to meet modern standards. Fans of the Sumo, and there are many out there will be happy to see Seiko give the watch some well-deserved attention. The New Seiko Prospex 200M Sumo Gradient Blue 3rd Gen Ref: SBDC175 and Gradient Grey 3rd Gen Ref: SBDC177 has been largely revamped recently, with many of the classic models updated and upgraded with more resistant materials and better execution. These subtle changes not only bring the Sumo up to current-day standards but also transform the watch significantly. Let’s take a closer look and see what the new Seiko Sumo dive watches offer.