There seems to be a small but growing interest within the SCUBA diving community in collecting and using vintage SCUBA gear from the 1950s and 60s. There is at least one online Diving forum now with a section dedicated to it.
Being naturally attracted to all things vintage, and having been a certified diver since my teens, I jumped on that bandwagon early and, thanks to eBay, soon had me a complete set of vintage SCUBA gear: oval, single-lens, single-skirt mask; US Divers/Aqualung double hose regulator; vintage steel tank, weightbelt, dive-knife and speargun. Still searching for a true vintage wetsuit that will fit me comfortably. Diving using such equipment is NOT for everyone. It's much harder (at first) and more risky than diving with modern gear. All vintage gear should be inspected, tested, and repaired by a certified professional before use. And still there are many dive parks and diveboat operators that will not allow vintage equipment dives under their watch. But if you want to stand out from the crowd, show up with some of this stuff on your next dive trip.
I'll try to take and post pictures of my gear soon. I'm starting to get a nice collection of it.