Limited edition of 888 units u boat watch chimera 46 carbonio 8057 the distinguishing feature of the u boat chimera collection is the iconic case with its striking crown cap and pushers these watches have a strong personality and embody italos passion for vintage culture with peerless clarity of design u boat watch chimera has a profoundly clean appearance and a very masculine character the bezel and case back are locked together by external tubing and a customized key that ensures total wa