The date code stamp, a code stamped on the bottom of every lighter, reveals the month and year of manufacture. This code makes dating your Zippo easy. Most lighters manufactured between 1933 and 1957 can be identified by style and model and the patent or patent-pending marks. Most of the time this ID code can be seen on the bottom of the lighter. Sometimes, as in the case of Barcroft lighters, you must look on the insert for the manufacturing codes. Zippo dating is a skill needed when buying a collectible Zippo – especially in a situation like a garage sale.
Copy the image below to your computer and make a wallet sized Zippo Dating chart to take with you: