Seiko Prospex x Automatic ft. Monster aka Save The Ocean (STO) (Special Edition) Men Diver Round 200m Water Resistant Watch SRPE09K1 SRPE09 SRPE-09 SRPE-09K1 Discover the Seiko Prospex Monster Save The Ocean Special Edition SRPE09K1 - a bold 200m diver watch with striking ocean-inspired design. Features 4R36 automatic movement (41h power reserve), hardlex crystal, LumiBrite lume, and secure 3-fold clasp. This 42.4mm stainless steel timepiece combines rugged durability with environmental awareness. Caliber Number / Movement 4R36 (automatic with manual winding capacity) Power Reserve / Accuracy Approximately 41 hours (+45 to -35 seconds per day) Crystal Hardlex crystal with magnifier Luminous LumiBrite on hands, indexes and bezel Case / Band Material Stainless steel case 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: 42.4 mm Length: 49.4 mm Lug width: 20.0 mm Other Specifications Seiko Prospex x Automatic ft. Monster aka Save The Ocean (STO) (Special Edition) SPECIAL EDITION on the case back Unidirectional rotating bezel Screw-down crown Screw case back 24 jewels Day and date display Stop second hand function (hacking mechanism) Regular timekeeping (analog display)