Hope friends don't think I am being funny but persoanlly I wouldn't touch a cylinder without a test cert with less tha 3 years on it. Even if you got it for £30.00 paid £40.00 to have it tested and someting was up it will be £70.00 down the drain. Get it tested and it would be worth about £110.00 . Brand new they are about £170.00.
A.G