Seiko Prospex x Automatic ft. Tuna aka PADI (Special Edition) Men Diver Round 200m Water Resistant Watch SRPA83J1 SRPA83 SRPA-83 SRPA-83J1 Seiko Prospex PADI Special Edition SRPA83J1 - Professional 200m diver watch with iconic Tuna case design. Features automatic 4R36 movement, lumibrite markers, unidirectional bezel, and durable silicone strap. This 51.7mm stainless steel timepiece boasts hardlex crystal, screw-down crown, and special PADI case back engraving. Built for serious underwater adventures. Caliber Number / Movement 4R36 (automatic with manual winding capacity) Power Reserve / Accuracy Approximately 41 hours (+45 to -35 seconds per day) Crystal Hardlex crystal Luminous LumiBrite on hands and indexes Case / Band Material Stainless steel case with silicone band Water Resistance 200m / 660ft diver Case Size Thickness: 13.4 mm Diameter: 51.7 mm Length: 52.0 mm Lug width: 22.0 mm Other Specifications Seiko Prospex x Automatic ft. Tuna aka PADI (Special Edition) Made in Japan SPECIAL EDITION on the case back Unidirectional rotating bezel Screw-down crown Screw case back 24 jewels Day and date display Stop second hand function (hacking mechanism) Regular timekeeping (analog display)