| ZIPPO IDENTIFICATION CODE | ||||
|---|---|---|---|---|
| YEAR | REGULAR | SLIM | ||
| LEFT | RIGHT | LEFT | RIGHT | |
| 1932 | Patent pending | |||
| 1937 | Patent #2032695 | |||
| 1950 | Patent #2517191 | |||
| 1957 | Full stamp with patent pending | •••• | •••• | |
| 1958 | Full stamp with no patent pending •••• •••• |
•••• | •••• | |
| 1960 | ••• | ••• | ••• | •• |
| 1961 | ••• | •• | •• | •• |
| 1962 | •• | •• | •• | • |
| 1963 | •• | • | • | • |
| 1964 | • | • | • | |
| 1965 | • | |||
| 1966 | | | | | | | | | | | | | | | | | | | | |
| 1967 | | | | | | | | | | | | | | | | | | |
| 1968 | | | | | | | | | | | | | | | | |
| 1969 | | | | | | | | | | | | | | |
| 1970 | | | | | | | | | | | | |
| 1971 | | | | | | | | | | |
| 1972 | | | | | | | | |
| 1973 | | | | | ||
| 1974 | //// | //// | //// | //// |
| 1975 | //// | /// | //// | /// |
| 1976 | /// | /// | /// | /// |
| 1977 | /// | // | /// | // |
| 1978 | // | // | // | // |
| 1979 | / | // | / | // |
| 1980 | / | / | / | / |
| 1981 | / | / | ||
| 1982 | \\\\ | \\\\ | \\\\ | \\\\ |
| 1983 | \\\\ | \\\ | \\\\ | \\\ |
| 1984 | \\\ | \\\ | \\\ | \\\ |
| 1985 | \\\ | \\ | \\\ | \\ |
| 1986 | \\ | \\ or II | \\ | \\ ou II |
| 1987 | III | III | ||
| 1988 | A to L | IV | A to L | IV |
| 1989 | A to L | V | A to L | V |
| 1990 | A to L | VI | A to L | VI |
| 1991 | A to L | VII | A to L | VII |
| 1992 | A to L | VIII | A to L | VIII |
| 1993 | A to L | IX | A to L | IX |
| 1994 | A to L | X | A to L | X |
| 1995 | A to L | XI | A to L | XI |
| 1996 | A to L | XII | A to L | XII |
| 1997 | A to L | XIII | A to L | XIII |
| 1998 | A to L | XIV | A to L | XIV |
| 1999 | A to L | XV | A to L | XV |
| 2000 | A to L | XVI | A to L | XVI |
| 2001 | A to L | 01 | A to L | 01 |
| 2002 | A to L | 02 | A to L | 02 |
| 2003 | A to L | 03 | A to L | 03 |
| 2004 | A to L | 04 | A to L | 04 |
| 2005 | A to L | 05 | A to L | 05 |
| 2006 | A to L | 06 | A to L | 06 |
| 2007 | A to L | 07 | A to L | 07 |
| 2008 | A to L | 08 | A to L | 08 |
| 2009 | A to L | 09 | A to L | 09 |
| 2010 | A to L | 10 | A to L | 10 |
| 2011 | A to L | 11 | A to L | 11 |
| 2012 | A to L | 12 | A to L | 12 |
| 2013 | A to L | 13 | A to L | 13 |
| 2014 | A to L | 14 | A to L | 14 |
| 2015 | A to L | 15 | A to L | 15 |
| 2016 | A to L | 16 | A to L | 16 |
| 2017 | A to L | 17 | A to L | 17 |
| 2018 | A to L | 18 | A to L | 18 |