Seiko Prospex x Automatic ft. 1970 Heritage aka Captain Willard Reissue aka The Black Series (Limited Edition of 5,500 Pieces) Men Diver Tonneau 200m Water Resistant Watch SPB257J1 SPB257 SPB-257 SPB-257J1 Explore Seiko Prospex Black Series - stealthy 200m dive watches with all-black DLC-coated cases, sapphire crystals, and the 6R35 movement (70h power reserve). These monochromatic tool watches feature lumibrite markers, unidirectional bezels, and rugged silicone straps, blending tactical aesthetics with professional dive performance. 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 (hard coating) case with fabric (polyester) band Water Resistance 200m / 660ft diver Case Size Thickness: 13.2 mm Diameter: 42.7 mm Length: 46.6 mm Lug width: 20.0 mm Other Specifications Seiko Prospex x Automatic ft. 1970 Heritage aka Captain Willard Reissue aka The Black Series (Limited Edition of 5,500 Pieces) Made in Japan Additional silicone strap inclusive 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)
![SPB257J1 (LE) [O]](https://cdn.shopify.com/s/files/1/0567/3851/3055/products/385c1ad93a7097d7b6af51625e3763c1.jpg?v=1758515633&width=480)
