Seiko Prospex x Automatic ft. Marinemaster aka Save The Ocean (STO) (Special Edition) Men Diver Round 200m Water Resistant Watch SPB299J1 SPB299 SPB-299 SPB-299J1 The Seiko Prospex SPB299J1 Save The Ocean Special Edition revives the 1968 diver legacy with a striking gradient blue dial, 42mm stainless steel case, and robust 6R35 movement (70h power reserve). This eco-conscious timepiece features 200m water resistance, sapphire crystal, and a unidirectional bezel - blending vintage aesthetics with modern dive performance for ocean advocates 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 case with stainless steel band (three-fold clasp with secure lock, push-button release with extender) Water Resistance 200m / 660ft diver Case Size Thickness: 12.5 mm Diameter: 42.0 mm Length: 48.8 mm Lug width: 20.0 mm Other Specifications Seiko Prospex x Automatic ft. Marinemaster aka Save The Ocean (STO) (Special Edition) Made in Japan SPECIAL EDITION on the case back Unidirectional rotating bezel Screw-down crown Screw case back 24 jewels Date display Stop second hand function (hacking mechanism) Regular timekeeping (analog display)