Ended up with one of those old pre 1988 Luxfer or Walter Kidde tanks?
Well, probably the easiest thing to do is to scrap it, cause you'll have a hard time getting it filled.
I use to do Pre 88 tanks, but no longer service Luxfer or Walter Kidde Pre 1988 tanks,
But again, everytime you need a fill, you'll have to come to me as I'm the only one that fills them.
There use to be a few places that filled them, but not anymore.
So, anything pre 88 in a Luxfer (catalina never used the bad alloy) or a Walter Kidde, just scrap it.