Solar watch

Seiko has an excellent track record when it comes to innovative watches, and its Astron series is a perfect example of that. Originally released in 2012 as the world’s first GPS solar watch, this latest generation, the Astron GPS Solar 5X, is the world’s smallest and thinnest solar-powered GPS watch. It has incredible functionality – solar cells on the dial mean the battery isn’t an issue, and the GPS automatically syncs the watch with satellites twice a day so it can track itself on 39 time zones. Available in a variety of styles, for about PGK8341; seikowatches.com.