Seiko has introduced four new models in its Astron Nexter GPS watch lineup: HAC001, HAC002, HAD001, and HAD002. All feature dark blue dials with chapter ring markings, titanium cases coated with Seiko’s DiaShield for extra durability, and solar-powered charging.
These watches automatically set the time and time zone by syncing with GPS satellites and can also fine-tune time via radio signals from multiple global regions.
HAD001: Flagship chronograph with world time function
The HAD001 stands out as the most feature-packed model, styled like a classic chronograph with three subdials and an outer ring that tracks world time across 25 cities. Powered by Seiko’s 8B92 caliber, it offers a stopwatch accurate to one-fifth of a second, a 24-hour indicator, and a perpetual calendar running through 2099.
Thanks to its lightweight titanium build, the watch measures just 10.6 mm thick and weighs around 90 grams. Additional highlights include a sapphire crystal with Super Clear coating for enhanced visibility, LumiBrite luminescent hands, and 10 ATM water resistance.
HAD002: Simplified dual time model
The HAD002 embraces a more restrained design with two subdials-one showing a 24-hour second time zone, the other a retrograde day-of-the-week indicator. It runs on the 8B63 caliber, displays dual time zones, and has a date window at 3 o’clock. Unlike the HAD001, its chapter ring shows UTC offsets instead of city names.
Radio signal reception supports the US, UK, Japan, China, and Germany. The watch weighs slightly more at 93 grams but retains the same titanium case and 10 ATM water resistance.
GPS and atomic time synchronization features
Both HAD models feature a black inner ring with letter markers integrated with the synchronization system: when connecting to GPS or atomic clock signals, the seconds hand points to these markers to display signal strength and connection status.
HAC001 and HAC002: Minimalist solar-powered watches
The HAC001 and HAC002 models target users who prefer a stripped-down approach. They run on the 7B62 caliber, offering essential functions like time and date, plus automatic synchronization and a perpetual calendar.
Both sport octagonal titanium cases:
- HAC001: 39.6 mm diameter
- HAC002: 36 mm diameter
The design keeps a clean and modern look.
Battery life and pricing details
Powered exclusively by solar energy, these Astron Nexter watches can run for up to nine months on a single charge without exposure to light and up to two years in power-saving mode, according to Seiko.
Sales in Japan begin this April with the following prices:
- HAD001: ¥176,000 (approximately $1,107)
- HAD002, HAC001, HAC002: ¥165,000 each (about $1,038)
International availability has not yet been announced.
Seiko’s Astron Nexter line competes in a crowded GPS watch field dominated by brands like Garmin, Casio, and Citizen. While Garmin emphasizes sports tracking and smartphone integrations, and Casio offers ruggedness with its G-Shock line, Seiko focuses on blending classic watchmaking with satellite-synced precision and premium materials like titanium.
As GPS-powered solar watches gain traction among enthusiasts seeking high accuracy without smartphone dependency, it will be interesting to see if Seiko’s new Astron Nexter models can carve out a niche by balancing sophisticated analog styling with modern technology. Watch enthusiasts should stay tuned for upcoming global launches and observe how these models perform against growing competition in both smart and hybrid timepieces.