So that doubling of the 4 is PMD? and why is the 1 or anything else not smashed? I would think if it were a coin roller went over it the 1 would also be smashed.
Because it probably wasn't damaged by a coin roller specifically, it was probably hit by something else that only contacted the 4 in the date.
Non_cents got it right. It certainly is not a DDO , look at how thin the inner portion of the slanted part of the '4', only half as thick. I would say MD in that area, PMD elsewhere perhaps.