Seiko's Prospex line issues a new collection of limited editions with an all-black color theme. The Black Series Limited Editions will consist of three dive watches: the SPB125J1 "Sumo" (left), SLA035J1 (center), and the SSC761J1 (right). The most exclusive of the trio is the SLA035J1 (available March), which is limited to just 600 pieces and features a 44.3mm stainless case, 300m/1000ft water resistance, and a Seiko 8L34 automatic movement with a 50-hour power reserve. The SSC761J1 (available February) will be limited to 3,500 pieces and features a 44.5mm stainless steel case, 200m/660ft water resistance, and a V192 solar-powered chronograph movement. The Sumo (available February) will have a 45mm case, 200m/660ft water resistance, and a 6R35 automatic movement.