I've got an oldish very cheap Rigidia (sp?) wheel Marco. It only has a thread on one side and the hub doesn't have a reverse thread for the lockring so you have to whack on a normal threaded one on hard and give it a whack to check it's tight every so often (weekly say). It's been hanging in the garage for ages so not sure of condition but it was okay when I hung it there, might just need a bit of cleaning and polishing with autosol.
I used it when I first built up a fixed so it's fine to use, just after getting bitten by the bug I got some decent wheels.