It has been lightly cleaned. Nice AU55 otherwise. If it goes to PCGS it will say AU Details Cleaning. It doesn't appear to match the MPD variety in my opinion. Just a neat clashed die and very pretty coin.
David Poliquin responded to my message. He says it is not a die variety, just die clashing, meaning it cannot be attributed as discussed earlier. It's still a beautiful coin, however, and you should be proud to own it!