Seiko's ultimate travel watch gets smaller with the Astron 5X series

The watch is now just 42.9mm in diameter.
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Seiko Astron 2018

We've always loved the Seiko Astron, but its larger case always had us yearning for something just a bit smaller. This week, Seiko announces its new Astron 5X, a more compact design that fits their GPS Solar movement inside a 42.9mm case that is also just 12.2mm in depth. The new movement adjusts the time in just three seconds and your timezone can be changed instantly with just a press of a button. It also features a new buckle system that lets you make micro-adjustments for a better fit when your wrist size contracts or expands.

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