It is hard to tell from the original picture, but it really doesn't look like a RH5°. But after 65 years, you may have one of every kind of wheel that was made. The RH5° were very common and safer wheels are pretty scarce. I replace them as I find safer wheels, but I have quite a few of the them. I try to put the safer wheels on the outside dual on the driver because that is the one that would blow to the outside if the wheel should separate.
