Seiko Prospex x Solar ft. Speedtimer aka The Black Series aka Night Vision Men Formal Round 100m Water Resistant Watch SSC923P1 SSC923 SSC-923 SSC-923P1 Discover the Seiko Prospex Black Series Speedtimer Solar Chronograph SSC923, featuring a 41.4mm black hard-coated case, gray dial with Green LumiBrite Pro for night visibility, and V192 solar movement with 6-month power reserve. Includes tachymeter bezel, 100m water resistance, and textile strap. A special edition watch inspired by 1969 Speedtimer design. Explore now. Caliber Number / Movement V192 (solar powered) Power Reserve / Accuracy Approximately 6 months when fully charged (+/-15 seconds per month) Crystal Sapphire crystal (curved, anti-reflective coating) Luminous LumiBrite on hands and indexes Case / Band Material Stainless steel (hard coating) case with leather (nylon) band (three-fold clasp with push-button release) Water Resistance 100m / 10 bar Case Size Thickness: 13.3 mm Diameter: 41.4 mm Length: 45.9 mm Lug width: 21.0 mm Other Specifications Seiko Prospex x Solar ft. Speedtimer aka The Black Series aka Night Vision Magnetic resistance (4,800 A/m) Screw case back Power reserve indicator Overcharge prevention function Date and 24-hour display Chronograph up to 60 minutes in 1/5-second increment Equipped with small second hand Regular timekeeping (analog display)