Just saw this one on eBay... it's got a qualifer for being MC, but they missed a stamp on the back "55". Guess it's a 5 MC/MK.
1955 Topps Clemente 0.jpg1955 Topps Clemente 0 back, looks like MK.jpg
I have a Mays rookie that's graded PSA-5MC and a '52 Topps J Robinson that's PSA5-OC, both of which have NM or EXMT+ at worst corners/border/surface. Their only flaws are the qaulifier, but it seemed to me the grader dinged them on their numerical grades too for being OC/MC. Oh well, I bought them graded and have no interest in trying to get them bumped.