Mostly I use coppercoins, Variety Vista and doubleddie.com, John Wexler's sites. With that decade of wheat cents, the overused 1950's wheat cents were way over used past normal retirement, it makes it harder to determine whether something is a hub or mintmark punch issue. Save this for now, and wait for a couple more to send to Wexler to see what he thinks. I question if it is a RPM or not, but with a few other finds, he could voice an opinion. So save the images for now until we find more to ask about.