The Seiko Prospex SPB237J1 is a men's automatic diver's watch, a modern reinterpretation of Seiko's 1970s diver's watch. It features a 42.7mm stainless steel case with a super-hard coating and a black dial. The hands and markers are treated with Lumibrite for enhanced visibility. Powered by the 6R35 automatic movement, it provides a 70-hour power reserve. The watch is water-resistant up to 200 meters and comes with a stainless steel bracelet.