This exclusive Seiko Astron Quartz SSH023 commemorates the 50th anniversary with a limited run of 1,500 units. It features a 42mm stainless steel case and bracelet treated with a super hard coating, complemented by a ceramic bezel and black dial. Powered by GPS solar technology, this timepiece includes advanced functions such as overcharge prevention, power saving, and a perpetual calendar validated through February 2100. It offers 39 time zones with world time and dual-time displays, day and power reserve indicators, and seamless time transfer between dials. Additional sophisticated features include satellite reception status, automatic time zone and daylight saving adjustments, in-flight mode to prevent GPS signal reception, and hand position auto-alignment for precision.