Seiko's solar-powered GPS Astron line was already a technical marvel, now it's one of the brand's best-looking watches, too.

New Seiko Prospex watch is solar powered and has a dark red dial inspired by vintage European racing cars. Priced at £730, it comes with a steel bracelet and a brown leather strap. It is limited ...

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 ...