Niels,
I saw that comment on the Posiden site. Perhaps they made their first single hose regulator at that time, but they did not make
the first single hose regulator. If their date of 1958 is correct, they are about
4th. The Porpoise CA-1 was the first. The inventor told me he sold his first regulator early in 1952. Mine has 1953 stamped on the tank valves.
The Sea Bee was made in 1954 and the Submatic was made in 1956. All were Australian. The Dawson Lung was made about 1958 and later sold by Sea Hornet, again an Australian product. The single hose was not patented because Ted Eldred could not afford to do so. Once his product was on the shelf, no one else could patent it, although some tried. Steve
This is the 1956 Scubmatic
This is the 1961 Sea Hornet, copied from the 1958 Dawson Lung
