The OceanX Sharkmaster Bronze SMB542 Tiger Iron Limited Edition is a high quality 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 Miyota 8315 movement. The glass is 4.1mm thick scratch resistant sapphire glass (with an AR coating). The impressive 500 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) and the watch comes with a very comfortable rubber strap with bronze buckle. This special model features a genuine Tiger Iron dial and is limited to just 100 pieces. The most obvious perk of the watch is the material: it's entirely made from CuSn8 bronze. Bronze has the great attribute that it builds up a layer of patina. This is an ongoing process which makes every watch unique. Discolouration is normal with this material. One major benefit is that you can largely bring back your watch in the original condition again!