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 Codes Free:Amazon.com:Appstore for Android
Zippo with date codes | Zippo with date codes | Flickr
Zippo : Date Codes | Zippo lighter, Zippo, Lighter
Zippo - Date Codes | Zippo USA
Genuine Zippo Oil Lighter Copper Windproof Cigarette Kerosene Lighters Gift With Anti-counterfeiting Code - Lighters - AliExpress
Zippo - Date Codes | Zippo USA
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
Are these Zippos with no date codes fake? : r/Zippo