Seiko Prospex x Automatic ft. 145th Anniversary aka Modern Samurai (Limited Edition of 9,999 Pieces) Men Diver Round 200m Water Resistant Watch HBB001K1 HBB001 HBB-001 HBB-001K1 Celebrate Seiko 145th anniversary with the limited edition Prospex HBB001, a modern Samurai diver powered by the automatic 4R35 caliber with a 41-hour power reserve. Featuring a sharp 41.7mm stainless steel case with signature accents, this 200-meter water-resistant timepiece is limited to 9,999 pieces worldwide and built for reliable performance both above and below the surface. Caliber Number / Movement 4R35 (automatic with manual winding capacity) Power Reserve / Accuracy Approximately 41 hours (+45 to -35 seconds per day) Crystal Hardlex crystal 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: 12.3 mm Diameter: 41.7 mm Length: 49.5 mm Lug width: 20.0 mm Other Specifications Seiko Prospex x Automatic ft. 145th Anniversary aka Modern Samurai (Limited Edition of 9,999 Pieces) LIMITED EDITION on the case back Magnetic resistance (4,800 A/m) Unidirectional rotating bezel Screw-down crown Screw case back 23 jewels Date display Stop second hand function (hacking mechanism) Regular timekeeping (analog display)