The M1 is a powerful and versatile sports watch, cementing our reputation as a leader in specialty dive and watersports watches. Made of tough 316L stainless steel, with unidirectional ratchet bezels and waterproof, screw-down crowns. All dials with Blackout Superluminous. Shown here with our transparent silicone rubber sport band. Rock solid quality and unmatched style, at an affordable price.