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Many of the ideas for what to include on this page have come from questions I have been asked by either people emailing me or questions in the Zippo Click forums.So to those who ask and to those who help to find the answer, I would like to say "Thank You".From 1957-1965 the code configuration on the slim lighters differed from the regular lighters (See Date Code Chart below). The appearance of the word "Zippo" in the bottom stamp provides another clue to dating.There have been three major changes, as shown in inset.
Several books have been published about Zippo lighters and lighter collecting. For the latest information about Zippo lighter collecting, visit Booth President and CEO Zippo Manufacturing Company Since its opening in 199C the Zippo/Case Visitors Center has attracted well over a million visitors from more than 120 countries. Case & Sons Cutlery, a subsidiary of Zippo since 1993, produces a legendary product, which has become one of the most collectible items in the world. Call the visitors' information line at (888) GGB-1932, or visit for information.
There are many references to changes in the design on Zippo lighters.
Most people reading this will be fully aware that the first lighters were taller, and that the bottom stamp has changed over the years.
In April 2005 the bottom stamp changed slightly, in that the registered trade mark sign () was moved from below Zippo to above it.
Some lighters in April were made with the at the bottom, and some were made with the at the top.
From 1933 to the mid 50s the word Zippo was stamped in block letters. From August, 1949 through July, 2002 Zippos were also produced in Niagara Falls, Canada - the only place other than Bradford, PA where they were ever produced.