The Seiko Prospex SPB239J1 is a men's automatic diver's watch, inspired by Seiko's 1968 diver's model. It features a 42mm stainless steel case with a super-hard coating and a black dial. The hands and markers are coated with Lumibrite for enhanced visibility. Powered by the 6R35 automatic movement, it offers a 70-hour power reserve. The watch is water-resistant up to 200 meters and comes with a stainless steel bracelet.