The Wenger Roadster Swiss Sport watch is perfectly suited to the outdoor enthusiast. The Roadster features include a large 43 mm case, Luminous hands and markers, 100m water resistance, sapphire-coated mineral crystal, rotating bezel, and screw down case back. Features: Crystals - The crystal is the clear surface which covers the watch dial. Crowns - Crowns are stainless steel knobs on the sides of the case body used to set the date and time or rotate the internal bezel.