Prospex

The SPB183 is a 42.7 mm steel automatic diver running the 6R35 at 21,600 vph with a 70-hour reserve and 200 m of water resistance, fitted with LumiBrite indexes and a steel bracelet. A 2020-only release, its slightly oversized 42.7 mm case nudges it just above the more common 42 mm 6R35 models in…

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