I have a 71 D Lincoln that has at least 2 and possibly 3 m/m. one is weak and located below the date between the 7 and 1 instead of the 9 and 7 rotated slightly counterclockwise with a possible m/m below that. It also has a m/m partially struck over the 1 in the date rotated clockwise 45 degrees. I am aware of RPMs but have not heard of them being in these odd locations. Unfortunately, not able to post pictures. Any thoughts on this coin.