The Seiko Astron SSH158J1 100th Anniversary Limited Edition Dual-Time GPS Solar Men Watch commemorates a century of Seiko innovation with a striking black and rose-gold titanium case and ceramic bezel. Powered by the GPS solar calibre 5X83, it delivers near-perfect accuracy through satellite synchronization, automatically adjusting to your time zone. This limited edition features dual-time capability, world time, perpetual calendar until 2100, and a 12-hour chronograph. With a sapphire crystal, power reserve indicator, and 100-meter water resistance, it blends advanced technology with a luxurious anniversary design.