Today I acquired a couple of old scuba tanks that haven’t been used since the early 90’s. I’ll do a visual inside and see if they are worth getting a hydo done. But im unable to figure out what volume of tanks they are and figured i’d ask on here before doing a volume measurement and some math lol. They look similar in size to an lp95 but are rated to 1800psi with the + on the first hydro. Born in 1977. Let me know if you recognize the size!