Modified Seiko Sport Watches

Our Seiko sport watches begin with genuine Seiko 5 Sports SRPD base watches and are independently modified at RSWatchWorks. Compare 42.5 mm 5KX designs with sapphire crystals, ceramic bezel inserts and model-specific hand and strap upgrades. Each product page lists the exact specifications.

Explore the Seiko 5KX Blackout with red or black strap, compare our compact Seiko dress watches, or request a custom watch build.