I've just taken my Govnair bottle to be retested and was chatting to the guy at JR Services where they do the testing and he said to be very careful about buying secondhand dive bottles at the moment due to a new legislation in dive bottles. Not sure what that legislation is all about, but he said a lot of divers/dive shops are selling their secondhand dive bottles to the paintball/airgun community and when they go to be tested they fail immediately.
For more info or your bottle to be retested speak to them on 01884 266400 or mobile 07816898083 (UK)
For more info or your bottle to be retested speak to them on 01884 266400 or mobile 07816898083 (UK)