From 1933 to the mid 50s, the word Zippo was stamped in block letters. What began as a quality-control tool for Zippo founder George G. To identify a potential pattern in any run of lighters returned for repair, the bottom of every Zippo lighter was encoded with a series of markings.The Zippo script logo was developed in the late 40s and was phased-in on the lighter bottom stamp around 1955. Since the 1950s, those markings provide a way to accurately date most Zippo lighters.The appearance of the word "Zippo" in the bottom stamp provides another clue to dating.There have been three major changes, as show in inset.Dating lighters made at the Canadian factory is a little more difficult, and often confusing, but with a little detective work, many of the clues are there.There is still much work and research to be done, and this page is by no means complete.
There are numerous sites around the internet that give dating charts for Zippo Lighters, and there are also dating guides in many of the Zippo Books.Starting in the mid 50s, date codes were stamped on the bottom. The date codes have since become an invaluable tool for Zippo collectors.