Thanks @davidnunn. Yeah, they may have been replaced at some point. They only have an O-ring on the inside of the wheel and are aluminum. The caps are newer and not aluminum. I have an appointment Monday with my local tire installation shop to have the old tires removed and to check out the valves. It's a good independent shop that is well known in the local car community. From there I'll see if I need new valves and then get some tires ordered.
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