Not sure if it's been posted here yet but here is a helpful tool to help y'all date your Zippo. : r/Zippo
Zippo - Date Codes | Zippo USA
Are these Zippos with no date codes fake? : r/Zippo
Date Your Zippo Lighter • The Lighterhouse
Zippo on Twitter: "When did Zippo start stamping date codes on the bottom of every lighter? #ZippoTrivia https://t.co/mOxDKf6oD2" / Twitter
Zippo Lighter Date Code | Do you check the date code before buying a new lighter? Click for more info on our Zippo lighter date code system! http://bit.ly/ZippoDateCode | By Zippo
Date-your-ZIPPO
Do the hash marks on the bottom of a Zippo lighter show different quality the more hash marks there are? - Quora
How To Date A Zippo , Zippo Date Codes Bottom Stamp - YouTube
Dating Zippo Lighters
Small zippo lighter | Antiques Board
Zippo : Date Codes | Zippo lighter, Zippo, Lighter
Zippo Dating Codes | PDF
Japanese Zippo Identification Stamps
Zippo Dating Codes | PDF
Code Briquet Zippo lighter Date : codes et Datation des briquets zippo de collection
Zippo : Date Codes | Zippo lighter, Zippo, Lighter
Zippo - Ancien ZIPPO Rasta "cool brother" CODE B 06
All About Zippo Lighters (How To Date Your Zippo For Collecting & Values) - YouTube