Seiko · Astron
Seiko Astron GPS Solar Dual-Time Chronograph SSH163 (reference SSH163) — specifications, measurements, watch images and standardized wrist-fit previews for informed comparison.
A 43.3 mm sport / travel watch with gps solar quartz movement (5X83) and 100 m water resistance.
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Specifications last verified: 2026-08-07.
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