Sure thing so far these are the coins in question (All are US coins):
1977 Quarter D
1977 Penny D
1978 Penny D
1979 SBA D
1983 Dime P
1984 Quarter P
I'll post more when I find them. Thanks
Before the 80's working dies were sent to the branch mints from the Philadelphia Mint and the branch mint hand-punched their mint mark onto the die. When the punch didn't punch the mint mark correctly it was punched again, thus creating RPM's.
During the 80's and 90's the mint mark was included as part of the working die's design for each series, so any mint mark that appears doubled now is called a doubled die, because die punches are no longer used.
I am not aware of any instance that wear would produce the same apearance as an RPM or doubling. It could be a "closed" or clogged mint mark that has machine doubling.
Wear can create many appearances but not RPM's or doubling.