Well it is a RPM, but probably a minor one. Did you check doubleddie.com, Variety Vista and Coppercoins.com? Each of these sites have different RPMs than the other. The first one listed will have the most, the last one, a few less and the Variety Vista site will only have the strongest RPMs listed. So keep it safe for now. With the condition it is in, it maybe listed by one or more of the sites in the future. I don't think the mark on the bottom of the '8' id anything. It could be a die scratch or die polishing? But not a
DDO. Not many listed that year, so they sites might be interested or not, if they feel it is too minor. But the condition of the coin may help it to get listed? Nice find. Keep it safe. I save all RPM, even if they are not listed. Who knows, someday they maybe. (Or not, I would not want to kick myself later for not saving them)