i keep all wheats, and mostly look for errors. Recently, using the
CherryPickers Guide and some other books, I made a list of errors/ varieties to look for... sorry for its length
1909 vdb
DDO (date, rty)
1909 s rpm
1910 s rpm
1911 d and s rpm
1917
DDO (date, trust)
1922 no d
1925 s
DDO (date, liberty, motto)
1925 s rpm
1927
DDO (motto, date, liberty)
1927 d rpm
1928 s large s
1929 s rpm
1930 d and s rpm
1934
DDO (field below date 3&4 show)
1934 d rpm
1935
DDO (date)
1936
DDO (date, liberty, motto)
1938 d and s rpm
1939
DDO (date, liberty)
1941
DDO (liberty, trust, motto, ear, 19)
1942 d and s rpm
1942 s rpm and
DDO (liberty, date)
1943 p and s
DDO (date, liberty)
1943 d rpm
1944 d rpm
1944 d d/s
1946 s s/d
1947
DDO (date, trust)
1947 s rpm
1949 d rpm
1950 s rpm
1951 d
DDO (liberty, motto)
1951 d d/s
1951 d misplaced mm (5 of date)
1952 d d/s
1953 d rpm
1954 d rpm
1955 p and d
DDO (liberty, date, motto)
1955 d and s rpm
1956 d rpm
1958
DDO (liberty, date, motto)
1959
DDO (date, liberty)
1959 d rpm
1959 d d in second 9
1960 s s/d
1960 proof
DDO (date, liberty)
1960 d
DDO (date)
1960 d rpm (d above) sm over lg date
1960 p and d small date
1961 d rpm
1962
DDO (date, nose, tie, trust)
1963
DDO (3 of date)
1964
DDO (l of liberty, in god)
1964 p and d
DDR (EPU, USOA)
1966
DDO (date, motto)
1966
DDR (states of america)
1968 d rpm
1968 d
DDR (EPU, america)
1969 s counter clash (unum under states)
1969 s
DDO ( motto, date, liberty )
1969 d no fg
1970 d rpm
1970 d
DDO (date 7 0)
1970 s s/d
1970 s
DDO (liberty, motto, date)
1970 s rpm
1970 s small date (7 level w 9 and 0)(weak ty)
1970 s
DDO (0)
1971
DDO (liberty, date)
1971 d
DDO (motto)
1971 s
DDO (date)
1972
DDO (liberty, motto, date)
1972 d and s
DDO (^)
1972 d rotated reverse
1974
Cud 1974
DDO (lettering)
1978 d rpm
1979 d rpm
1980
DDO (date)
1982
DDO (motto)
1982
DDR (EPU)
1982 rotated reverse
1983 Cu
1983
DDO (liberty, motto, date)
1983 reverse
Cud 1983
DDR (all lettering)
1983 rotated reverse
1984
DDO (ear, chin, beard)
1984
DDO (date, liberty, base of bust)
1984 d
DDO (date)
1985 d rpm
1986 rotated reverse
1986 d rpm
1987 d d between 1 and 9 (bar under 9)
1987 d
DDR (last columns)
1987 d rpm
1988 d rpm
1988
DDO (ear)
1988 p and d 89 reverse (strong FG)
1989 d rpm
1990 d
DDR (1st column)
1991
DDR (column 2)
1991 d
DDR (columns 2,3,9,10,11)
1992
DDO (eye)
1992 clash (line from bottom of 1st 9)
1992 p and d
Close AM 1992 d
DDR (columns 2 and 3)
1993 clash above date
1993 d
DDO (columns 2-7)
1993 d rotated reverse
1994 clash (under 1st 9)
1994 rotated reverse
1994
DDR (3 rightmost columns)
1994
DDR (RICA and FG)
1994 phantom d
1995
DDO (liberty, motto)
1995
DDR (rightmost columns)
1995 clash F On date towards bust
1995 d
DDO (motto)
1996 clash ST into rim to right of vdb
1996 clash through date
1996 clash left of Lincolns shoulder
1996
DDO (we trust, date)
1996
DDR (column 2 right from abe)
1997 clash under date
1997 clash above states
1997
DDO (ear)
1997 d
DDR (all columns)
1997-1999 phantom d
1998-2000
Wide AM 1998 steps behind lincoln
1999 clash under y in liberty
1999 clash T between bust and Y
1999
DDR (column 11)
2000 clash URIBUS below bust into rim
2000 clash below ear reverse columns
2000 clash under bust to the right
2001
DDO (ear)
2001
DDO (thick liberty)
2002 rotated reverse
2003
DDO (notching on liberty)
2003
DDR (FG)
2004
DDO (dot under ear)
2004
DDO (notching on liberty thick USOA)
2004
DDR (Abes feet, knees, column 6/7)
2004
DDR (6th column tilt by feet)
2004 d
DDR (top right above abe)
2004 p and d
DDR (thick EPU)
2005
DDR (between knees, col 6/7)
2006
DDR (feet south)
2006
DDO (ear)
2006
DDO (date, liberty, in god)
2007
DDO (date, liberty)
2008
DDO (beard into neck)
2008
DDR (knees, feet, column 6/7)
2009 formative years
DDR 2009 professional life clash (neck)
2009
DDO (ear)
2009
DDO (thick liberty)
2010
DDO (thick liberty)
2011
DDO (liberty, date)
2011
DDR (LB)