Seiko Astron x GPS Solar ft. Dual-Time Chronograph aka Nexter Series Men Formal Round 100m Water Resistant Watch SSH161J1 SSH161 SSH-161 SSH-161J1 Discover the Seiko Astron Nexter GPS Solar Chronograph - a fusion of rugged design and cutting-edge tech. Featuring the new Caliber 5X83 with 1/20-second stopwatch, dual time zones, and faster time transfer. Available in crystal white, midnight blue, or asphalt gray, with a slim titanium bezel and hairline-pattern dial for ultimate precision and style. Caliber Number / Movement 5X83 (solar powered) Power Reserve / Accuracy Approximately 6 months when fully charged (+/-15 seconds per month without GPS signal) Crystal Sapphire crystal (super-clear coating) Luminous LumiBrite on hands and indexes Case / Band Material Titanium (super-hard coating) case with titanium band (three-fold clasp with push-button release, smart adjuster function) Water Resistance 100m / 10 bar Case Size Thickness: 12.4 mm Diameter: 42.0 mm Length: 49.5 mm Lug width: Integrated Other Specifications Seiko Astron x GPS Solar ft. Dual-Time Chronograph aka Nexter Series Made in Japan Magnetic resistance (4,800 A/m) Allergy-safe metal Screw case back DST (daylight saving time) World time function (38 cities) Time transfer function (switching between main and sub-dial) Perpetual calendar (to 28 February 2100) Chronograph up to 12 hours in 1/20-second increment Power reserve indicator Overcharge prevention function Power saving function (hands stop to save power when left in the dark) Automatic hand position alignment function Day, date, 24-hour and dual-time display Regular timekeeping (analog display) GPS Function GPS signal reception function (time zone adjustment, automatic time adjustment, manual time adjustment) Reception result display function Satellite acquisition status display function Function to prevent the GPS signal reception (in-flight mode)