Seiko's GPS-linked, solar-powered, multiple-complication Astron chronograph got a luxuriously upgraded case and bezel.
They were also the world’s first solar GPS watches, which means they draw their energy from light and rarely require a battery change. The timekeeping prowess of Seiko’s Astron watches is ...
The Seiko Prospex 1965 Heritage Diver is a take ... This one isn’t quite as revolutionary, but it is the world’s first GPS solar watch with its quartz powered 3X62 movement.