Seiko Prospex x Automatic ft. King Sumo Men Diver Round 200m Water Resistant Watch SPB323J1 SPB323 SPB-323 SPB-323J1 The Seiko Prospex Sumo elevate dive watches with 45mm stainless steel cases, ceramic bezels, and the 6R35 movement (70h power reserve). Featuring 200m water resistance, lumibrite markers, and bold sunburst dials, these modern Sumos blend rugged performance with refined aesthetics for serious divers and collectors. Caliber Number / Movement 6R35 (automatic with manual winding capacity) Power Reserve / Accuracy Approximately 70 hours (+25 to -15 seconds per day) Crystal Sapphire crystal (anti-reflective coating) Luminous LumiBrite on hands, indexes and bezel Case / Band Material Stainless steel (super hard coating) case, ceramic bezel insert with stainless steel band (three-fold clasp with secure lock, push-button release with extender) Water Resistance 200m / 660ft diver Case Size Thickness: 13.4 mm Diameter: 45.0 mm Length: 52.6 mm Lug width: 20.0 mm Other Specifications Seiko Prospex x Automatic ft. King Sumo Made in Japan Unidirectional rotating bezel Screw-down crown Screw case back 24 jewels Date display Stop second hand function (hacking mechanism) Regular timekeeping (analog display)