Any way to ID this tank?

[Rred]

Bob-
Are you sure about J valves? My LDS says they can leap out of the closet in the middle of the night and kill you, they're incredibly dangerous and should be kept far far away. (sigh)

But seriously, valves that old, tanks that old, plenty of chance for the tank to have been abused (found in a basement no doubt) so it might or might not pass hydro, but $15 becomes $55 or $60 if you add the hydro that you'll need to find that out. And then you've got to try rebuilding or replacing the valve, and the nice folks at XS never have been called cheap.

A lot of bother if you're not in the Vintage Gear cohort.

 

[Scared Silly]

It’s a steel tank (3AA) made before 1966 when the ICC became the DOT. It looks like but is hard to tell that it was made by Presssed Steel Tank Co but the markings I see are very faint. Any other information would need better pictures of the stamps.

The above is the most accurate. It is an LP 72 made by PST (I can see the PST on the cylinder). The fill pressure is 2250psi and a full 72cuft 2722 psi. They are basically neutrally buoyant. BITD they were the defacto std. cylinder.

One can get a modern valve for these cylinders: XS Scuba PRO 1/2" NPT Threads. Further, note these valves are yoke/din.

As for the $15 and an hour drive. The OP would be better off looking for a new/larger cylinder which will have more blast for cold water.

 

[Scuba-74]

As for the $15 and an hour drive. The OP would be better off looking for a new/larger cylinder which will have more blast for cold water.

Thanks for the additional info! I would definitely prefer a negatively buoyant cylinder with at least a 100 cf capacity for the cold water diving I will be using it for. Will keep on looking.