Seiko Prospex x Automatic ft. Emperor Tuna aka Diver 55th Anniversary (Limited Edition of 1,100 Pieces) Men Diver Round 1000m Water Resistant Watch SLA041J1 SLA041 SLA-041 SLA-041J1 Introducing the Seiko Tuna SLA041, a limited edition professional diver watch celebrating 55 years of innovation. Inspired by the iconic 1975 model, it features a striking blue dial and a durable monoblock titanium case. With a depth rating of 1,000 meters and advanced materials like Ever-Brilliant Steel and a soft iron dial for anti-magnetic resistance, the SLA041 blends classic design with modern technology for an exceptional diving experience. Caliber Number / Movement 8L35 (automatic with manual winding capacity) Power Reserve / Accuracy Approximately 50 hours (+15 to -10 seconds per day) Crystal Sapphire crystal Luminous LumiBrite on hands, indexes and bezel Case / Band Material Titanium / Ever-Brilliant steel case with silicone band Water Resistance 1,000m / 3,300ft diver Case Size Thickness: 17.2 mm Diameter: 52.4 mm Length: 53.5 mm Lug width: 22.0 mm Other Specifications Seiko Prospex x Automatic ft. Emperor Tuna aka Diver 55th Anniversary (Limited Edition of 1,100 Pieces) Made in Japan LIMITED EDITION on the case back Serial number engraved on the case back Reinforced magnetic resistance (40,000 A/m) 28,800 vibrations per hour (8 beats per second) Unidirectional rotating bezel One-piece structure Screw-down crown 26 jewels Date display Stop second hand function (hacking mechanism) Regular timekeeping (analog display)