Off the top of my head
I would say that the 1952 1953 and 1954 1968 1969 1970 S minted coins
1960 1961 1962 1963 1964 1968 1969 1970 D minted coins are probably the toughest. Bold type being really difficult.
More modern ones are 1976 1979 1982 1983 1984 1985 1986 P & D
Here is a PCGS link for the price guide for these ... See the row with FS
http://www.pcgs.com/Prices/PriceGui...erson+Nickel
I would say that the 1952 1953 and 1954 1968 1969 1970 S minted coins
1960 1961 1962 1963 1964 1968 1969 1970 D minted coins are probably the toughest. Bold type being really difficult.
More modern ones are 1976 1979 1982 1983 1984 1985 1986 P & D
Here is a PCGS link for the price guide for these ... See the row with FS
http://www.pcgs.com/Prices/PriceGui...erson+Nickel




















