Card authenticity from a distance??

[drc]

Look awfully bright colored and clean to me, which makes me wonder. But other than that I don't see any obvious signs of being reprints. None of the cards is rare, so it's certainly possible for a small local auction to have genuine examples.

The backs and sides should be genuine cardboard if genuine. I don't know of any reprints that have matte cardboard on back.

I doubt the 62 and 64 Mantles or the 59 Aaron are a big focus of counterfeits in the hobby. Those aren't years counterfeiters would normally pick. If it was a 52 Topps Mantle instead of the 62 Topps and a 51 Bowman instead of the 64T, I'd be much more suspicious.

I think they're likely genuine. Just my guess from looking and thinking at a distance.