My father recently passed away and a zippo lighter was passed down to me from him. When I saw it I figured it was either a gift from his older brother or belonged to him because of the globe and anchor emblem on the front (marine Corp for the non Americans) My uncle fought in the Korean War. I did some research and could not locate the date stamps so I learned it was pre 1955, then after more research I learned that particular zippo logo was used from 1948-1955. I was then able to date it further by the patent number and because of the "patent pending" learned it was made between 1950 and 1955. Pretty cool right?