I don't see a listing for your coin. But I'm not convinced yet that it is a RPM. See if you can find some of your devices affected in the same direction as the bottom of the mint mark? (MD) That might be a reason for the bottom mark, but there is something going on with the left side of the mint mark. But as for a OMM, that would be impossible. As the only mint mark used that year was the 'D' mint mark. So I would like to see some closer views of the mint mark and building and AMERICA to see what may have caused this issue? Or if it is a legit RPM or not. The jury is still out on this one so far.