| 1956 |
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Zippo starts production of slim lighters. The lghters have a flat bottom. The insert has a " wheel guard " ( cobra head ) to protect the flintwheel. |
| 1957 |
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The insert has the same logo as in 1956 but lacks the " wheel guard ". |
| 1958 |
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The insert variation still has the horizontal logo , althoug the " Flints and Fluid " logo has been added above the " Patent Number " logo. Now Slims are also produced in Niagarafalls Ontario Canada. Those Canada Slims can only be identified by the insert. |
| 1959 |
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The logo runs the length of the insert from now on and the chimney on this model is not longer dimpled. This model must have a " large hollow " rivet. |
| 1960 |
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1960 there are two different bottom stamps. |
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| 1961 |
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| 1962 |
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| 1963 |
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| 1964 |
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Circa 1964 Zippo replaced the " hollow " rivet in the flint wheel with a " solid " rivet on slim models. |
| 1965 |
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1965 the lighter has no Date- Code. |
| 1966 |
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| 1967 |
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From August 1967 the Patent Number is missing. The canned bottom is produced from the end of 1967 up, there are two versions of this canned bottom. |
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| 1968 |
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| 1969 |
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| 1970 |
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The " Zodiac Series " are marketed. |
| 1971 |
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| 1972 |
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| 1973 |
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| 1974 |
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" Bradford PA. " is stamped on the bottom. |
| 1975 |
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| 1976 |
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| 1977 |
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| 1978 |
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Zippo modified the wind holes on the chimney by making them smaller, as well as modifying the chimney's rear view. |
| 1979 |
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Since late 1979 a new Zippo logo is stamped on the bottom. | |
| 1980 |
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| 1981 |
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| 1982 |
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| 1983 |
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| 1984 |
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| 1985 |
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| 1986 |
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1986 the new Date Code appears , it shows the month and the year of manufacturing. |
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| 1987 |
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| 1988 |
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| 1989 |
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| 1990 |
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" Made in USA " is stamped on the bottom. |
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| 1991 |
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| 1992 |
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| 1993 |
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| 1994 |
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| 1995 |
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| 1996 |
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| 1997 |
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| 1998 |
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| 1999 |
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| 2000 |
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2000 has two different bottom stamps. From 2000 up to now the year is shown in arabian numbers. |
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| 2001 |
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| 2002 |
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| 2003 |
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| 2004 |
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| 2005 |
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| 2006 |
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| 2007 |
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