The 1960s and 1970s were a period of diving innovation, with the move to saturation diving to meet the demands of the oil industry in places like the North Sea. British divers often led the way and a generation of them trained in the Royal Navy, qualified as members of the legendary Clearance Divers and then moved on to work for the specialist diving company Comex. While they would often be issued with a watch to use during service, some preferred to buy their own. This rare “Double Red” Sea-Dweller model 1665 was one such watch, bought by a former RN Clearance Diver while later diving commercially. The lives of these modest men were remarkable and we owe much to them and their many lost colleagues. It is always a privilege to meet such divers, to hear or read their stories and perhaps buy their trusty old watch from them!