This is from the
Lincoln Cent Resource. It might help to explain.
San Fransisco Mintmark Styles
Mintmarks have changed design many times during the
Lincoln Cent Series. The San Fransisco
Mintmark "S" has actually changed 15 times!
Here is a list of all the San Fransisco mintmark styles:
Mintmark Style-001 (Blocked Serifs) used from 1909-1916
Mintmark Style-002 (Small S) used from 1917-1941
Mintmark Style-003 (Large S) used only in 1928
Mintmark Style-004 (Trumpet Tail Serifs) used from 1941-1942 and again in 1945-1952
Mintmark Style-005 (Straight Serifs) used from 1943-1944
Mintmark Style-006 (Ball Serif) used from 1944-1946
Mintmark Style-007 (Sans Serif) used from 1946-1947
Mintmark Style-008 (Tall S) used from 1952-1974
Mintmark Style-009 (Blob S) used from 1974-1979 (74 proof & business strikes, proof only 75-79)Mintmark Style-010 used from 1979-1981(proofs only)
Mintmark Style-011 used only in 1981(proofs only)
Mintmark Style-012 used from 1982-1984 (proofs only)
Mintmark Style-013 used from 1985-1989 (proofs only)
Mintmark Style-014 used from 1990-1999 (proofs only)
Mintmark Style-015 used from 2000-2007 (proofs only)
Mintmark Style-016 used from 2008- Pres (proofs only)
link:
http://www.lincolncentresource.com/..._Styles.htmlMMS-008 Tall S

MMS-009 Blob S
