Obverse picture of a wheat, reverse of a memorial? The obverse does not really look like a lam error to me. Looks more like the coin was exposed to something.
THAT IS RARE! A memorial reverse on a 1948 cent! Unique! Also, one of a kind. Early pattern no doubt, worth trillions
Neither do I. If it is something that obvious, as the wrong reverse on a 1948, I know that I would had sent it off the very next day to get it graded. I'm not saying that it's a fake. Just saying that if it's the real deal, get in graded then show it as graded with wrong reverse.