Limited edition of 999 pieces u boat watch chimera net tungsten limited edition 8065 like most u boat watches you will never fail to make a lasting impression with the chunky 46mm stainless steel case of the u boat chimera net tungsten limited edition watch the case is designed to be completely durable as the bezel and case back are locked together by external tubing to ensure absolute water resistance while the bezel ring is crafted from polished tungsten the strongest of natural metals