Seiko Prospex x Automatic ft. 1968 Heritage aka Slim Turtle aka The Black Series (Limited Edition of 4,500 Pieces) Men Diver Tonneau 200m Water Resistant Watch SPB335J1 SPB335 SPB-335 SPB-335J1 Embrace the darkness with the Seiko Prospex Black Series Limited Edition - a 200m ISO-certified diver limited to just 4,500 pieces. Featuring Seiko thinnest mechanical diver case with black hard coating, Green LumiBrite Pro for maximum nighttime visibility, and a 70-hour automatic movement, this stealthy timepiece is built for adventure. The black dial, anti-reflective sapphire crystal, and black silicone strap complete this professional-grade tool watch designed for extreme conditions. Caliber Number / Movement 6R35 (automatic with manual winding capacity) Power Reserve / Accuracy Approximately 70 hours (+25 to -15 seconds per day) Crystal Sapphire crystal (curved, anti-reflective coating) Luminous LumiBrite on hands, indexes and bezel Case / Band Material Stainless steel (super hard coating) case with silicone band Water Resistance 200m / 660ft diver Case Size Thickness: 12.3 mm Diameter: 41.0 mm Length: 46.9 mm Lug width: 20.0 mm Other Specifications Seiko Prospex x Automatic ft. 1968 Heritage aka Slim Turtle aka The Black Series (Limited Edition of 4,500 Pieces) Made in Japan LIMITED EDITION on the case back Serial number engraved 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)