I did a little research when I got home and it seems that Aqualung was just a generic term first used by Cousteu in the Silent World and U.S. Divers appears to be the manufacture - I dug out my second regulator bought in the 50's and it is a U.S. Divers two hose double stage regulator that I used until I couldn't get parts for it in the mid 80's. My first was a double hose single stage but I don't have it anymore.
Anyone know more on the early Cousteu design regulators of the late 40's early 50's? I still have my first real fins - black rubber full foot Cressi total length 18 inches :). I actually used these until I replaced them with Omer Tuna's in 1999. Amaing how esy it was to free dive and spearfish to 100 feet with that equipment but of course we were teens then and didn't knw better.
Wish I still had my full face oval masks as momentous to keep with my Cresi fins and U.S. Divers regulatr.
I remember diving Cozumel in the 80's with no B.C., no pressure gauge, just a basic strap and my double he's U.S. Divers regulator and everyone else had B.C's etc. was often asked if my regulator was something new!!! :laughing:
Sorry, brings back old memories.
Here is what I found: Aqua-lung - Wikipedia, the free encyclopedia