Looks like there is some light MD underneath the lower serif on yours. You have to remember that this was the mm punch that was horribly overused too(46 through 52)(74 through 79), there is a lot of "junk" floating around, both inside and around the perimeter of this mm. Below is a pic of WRPM-009 and where the actual RPM is, arrow pointing at the split in the tail of the southern serif.

-makecents-