If you do enough buffing of the wheels with a wire brush to find stamped names and numbers, you'll probably discover different manufacturers' names. Just don't try to mix and match components from different wheels- - - -the fit is critical and different makers' parts usually don't work well together.
The quick way to identify the RH5's is to look for a flat band about 2" wide down where the wheel barrel meets the center, and there's no obvious removable ring where the tire sidewall meets the rim on either side. There's no danger about deflating them and dismantling the two halves to remove the tires, but the pieces should be defaced to the point they can't be assembled again. I like to torch out a big chunk of the mating joint. Those rims make good anchor bases for bench grinders, anvils, etc.
Jerry
