I was checking a roll of old nickels and found this one. It is a well worn 1940 S which has a lot going on.
1) It looks to be an RMP on the S 2) From what I'm seeing is there is a die clash by the date to on the Obverse and on the Reverse through Monticello and "FIVE CENTS". It also appears there may be some on the "E" & "P" of the E Pluribus. 3) looks to also have planchet errors on the Obverse and Reverse.