Dating your zippo lighter
As with most collectibles, the date of manufacture of a Zippo lighter often affects its value.Valuable information on the bottom of every Zippo windproof lighter can help you determine its date of manufacture.
There have been three major changes, as show in inset.Earlier lighters are much more difficult to date accurately.I am going to start with the last undated lighter as this is the easiest to date.The first stamp used on the base of the lighter bore the legend "PAT. This was used on lighters manufactured until around the end of 1950. There are many examples of "Pat Pend" cases with "Pat 1950" inserts (see below) these lighters would have been made around the time of the changeover at the end of 1950 using stock cases and newer inserts.Dating "Pre Coded" Zippos 1946 - 1955 The date coding on Zippo lighters was introduced in late 1955, so lighters made after this date are very easy to identify.