I've got this 1953 D Nickel that I think has one or more DDR errors. The first one is a doubling of the mint mark. I know it's hard to tell but anyone can confirm? Second error is the word pluribus. Any help greatly appreciated.
It is on the mintmark, then it is an RPM (repunched mintmark) - not a DDR (double die reverse). The die is hubbed before the mintmark is punched, so the mintmark would be unaffected by any doubling of the die. That being said, it is more likely machine doubling (very common, and not worth a premium). I can't tell anything from your pictures.