Seiko Astron x GPS Solar ft. Dual-Time Chronograph aka Starry Sky (Limited Edition of 1,500 Pieces) Men Formal Round 100m Water Resistant Watch SSH171J1 SSH171 SSH-171 SSH-171J1 Own the exclusive Seiko Astron GPS Solar Dual-Time Chronograph Limited Edition (1,500 pieces). Featuring a stunning purple gradient dial with star-trail motifs, titanium case with black coating, and 5X83 caliber for 1/20-second chronograph + 39 time zones. Includes perpetual calendar, LumiBrite, and sapphire crystal. A fusion of precision and celestial-inspired elegance. 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 (dual-curved, 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 Starry Sky (Limited Edition of 1,500 Pieces) Made in Japan LIMITED EDITION on the case back Serial number engraved on the case back 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)