The US Divers Deep Star was an unbalanced, downstream piston regulator. It was the father of the later model Aquarius, and was available in US Divers catalogs from 1965-1969. It had one high pressure port, and 1 low pressure port.
|The 1969 catalog photo for the Deep Star, which was 400 dollars in 2016 money.|
I really like diving these little regulators. They are about as simple as a regulator gets, much like the later Aquarius. As a matter of fact, they even share a parts kit in common. If you are a gun guy, then the Deep Star and its descendant the Aquarius would be your truck gun. These regulators make great warm water regulators, backups regs, and are great to keep around for teaching people to dive. As a matter of fact, for years my wife dove either a Deep Star or an Aquarius. She really liked how simple it was, and the fact that due to its design it breathes great on a full tank, then gets a little bit tougher towards the end of a tank. I guess you could say this of all regulators of this design, but on a low tank the lower intermediate pressure almost functions like a sort of warning signal that it is time to go.
These regulators are pretty common at flea markets and Ebay, and due to how easy they are to work on you can even keep a parts kit in your save a dive kit. I've rebuilt one of these on a picnic table at a dive meet before, using only a wrench, a brass pick, and a multi-tool. I've given them as gifts to my military buddies who were making junior enlisted pay and were stuck in the barracks. Sometimes, simple is really good. Ask a Russian infantryman if he wanted that fancy German Kar98K and its highly engineered gun oil over his crude Mosin-Nagant rifle with kerosene wiped on it after hundreds of Kar98Ks froze shut due to their tight tolerances during the Battle of Stalingrad. Less parts means less to leak, less to break, and less to lose. I've gotten Deep Stars off of Ebay from the 60s that have never been rebuilt and worked when I put them on a scuba tank.
|Here is a Deep Star, rebuilt to original specification, with the later and much more maligned Deep Star II.|
In an odd bit of trivia, there was also a movie called Deep Star, as in Deep Star 6. It featured a monster that looked like this:
|"Hello sir, do you have a moment to talk about diving history?"|
Before I get too drunk, let me remind you to join us for discussion of the Deep Star regulator at Vintage Double Hose, the definitive authority on vintage scuba diving.