This Phoebus 30 is likely from the 50's as the colourful logo with the lighthouse did appear after the war on cartons, round and then straight tins. At least that is my understanding. What makes this stove different from the many other but similar 1-pinters is the way the tank is closed. The design of a screw instead of a cap necessitated an inside and outside thread on the central tank boss, and a different foot brace which was to accomodate that screw cap while the stove was in use. Cost-effectively an expensive gimmick I think, and several 30 models I have seen lack that screw that is not easily replaced.