Cases and Case Backs

The foundation of every build. Our conversion cases and case backs let you reshape a stock Seiko into a Nautilus, GMT, or diver-inspired silhouette without touching the movement. Each case is listed with its lug width, case diameter, and which movements and dials it accepts, so you can plan a full build before you buy. Screw-down case backs are gasketed for water resistance.
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The highest price is S$429.00