look for
1959 DDO: date; Liberty
1959D Repunched MM
1960 SD
1960D LD DDO: date, MM
1960D LD Repunched MM
1961D Repunched MM
1962 DDO: date, nose, bowtie, Trust
1963D DDO: 3 of date
1964 DDO: L of Liberty, In God
1964 DDR: E Pluribus Unum, United States of America
1968D Repunched MM
1968D DDR: E Pluribus Unum, America
1969S DDO: In God We Trust, Liberty, date
1970D Repunched MM
1970D DDO: date (7,0)
1970S SD
1970S LD DDO: Liberty, In God We Trust, date
1970S LD Repunched MM
1971 DDO: Liberty, date
1971D DDO: In God We Trust
1971S DDO: date
1972 DDO: all obverse lettering, date
1972D DDO: In God We Trust, Liberty, date
1972S DDO: In God We Trust, Liberty, date
1973 No VDB
1980 DDO: date
1980D/S
1982 LD Cu DDO: In God We Trust
1983 Cu
1983 DDO: Liberty, In God We Trust, date
1983 Obv Die Damage (counter clash), Major Cud on Rev
1983 DDR: all lettering
1984 DDO: ear, chin and beard
1984 DDO: date, Liberty, base of bust
1984D DDO: date
1985D-1989D Repunched MM
1987D errant D in date between 1 and 9
1989 No VDB
1992, 1992D Close (touching) A and M of America I HAVE ONE OF THESE I FOUND A FEW MONTHS AGO
1994 DDR: three rightmost columns
1994 Phantom D
1995 DDO: Liberty, In God We Trust
1995 Clash: F on date toward bust
1995D DDO: In God We Trust
1996 Clash: ST into rim to right of VDB
1996 DDO: We Trust, date
1997 DDO: ear
1997-1999 Phantom D
1998, 1999, 2000 Proof Style Rev: Wider gap (not touching) between A and M of America
1999 Clash: T between bust and Y
2000 Clash: URIBUS below bust into rim
2001 DDO: thick letters in Liberty
2003 DDO: slight notching on letters in Liberty
2004 DDO & DDR: slight notching on letters in Liberty and very thick United States of America
2004 DDR: very thick E Pluribus Unum
2004D DDR: E Pluribus Unum
list is from this site