Zippo Dating Quick Reference – How to Date a Zippo. Learn how to date your Zippo lighter with this printable Zippo Dating Quick Reference from In Quiet Detail. This compact collector’s guide is designed to help identify the production year of vintage and modern Zippo lighters by comparing their bottom stamps, date codes and insert details. The guide covers Zippo date codes from 1958 to 2026, including the classic dot, bar, slash and backslash systems as well as the Roman numeral and letter date codes introduced from 1986 onward. It also includes dedicated references for Slim lighter codes from 1956 to 1965. For older Zippos, the guide provides detailed visual bottom stamp references covering examples from 1933 through 2001, with individual historical stamp examples for easy comparison, including variations found on early Zippo cases, replicas and special production years. A separate insert identification section covers original Zippo inserts from 1932 through the 1980s and includes references for early production periods, transitional inserts and 1941 Replica inserts. Because case and insert dates can differ, both references can be useful when dating a vintage Zippo. Whether you are a new collector, researching a vintage Zippo or trying to determine the production year of a lighter from your collection, this Zippo Dating Guide provides a practical visual reference for identifying Zippo date codes, bottom stamps and historical insert variations. This is an independent collector reference created by In Quiet Detail and is not an official Zippo publication.