The OceanX Sharkmaster 300+ SMS325 is a high quality, very special Swiss Made watch. It pays tribute to diving watches of the present and the past, but does have key OceanX elements. Under the hood you will find an automatic, renowned, Sellita SW200 (Swiss Made) movement. The glass is scratch resistant super domed sapphire glass. The impressive 300 meter water resistance of this watch is possible due to the helium valve, that you can see on the side of the case. The uni-directional 120 clicks bezel has a ceramic insert (which is very scratch resistant). The case is made from Damascus steel, which is a combination of 304 and 316 steel and offers unique patterns throughout the case. This special edition is limited to just 100 pieces.