Just a worn D MM from what I see. If this were a RPM ( repunched Mint Mark ) one would be able to see separation lines on or around the MM. This link should help.http://www.coppercoins.com/lincoln/dietype.php?date=1985&die_mint=d&die_type=mm&page=0
I think I see what you are seeing, but unfortunately from my perspective it looks like mechanical doubling. Could we see some shots of the MM with the date included? Keep up the hunt!