pat.2032695 is the appearance patent applied by Zippio for the 41 style lighter. I won’t go into details about zippo being a trademark. The two digits on the right side of the zippo trademark are the year, and the English letters on the left are the months. A means January, b means February, and so on. Do you recognize the English letters? ... bradford.pa, where zippo is located. Made in USA, made by Uncle Sam~ Like the 1941 I am holding, the sterling printed on it means standard sterling silver, which means that the lighter shell is made of sterling silver. There are also a capital letter A engraved below the 41, and then there is a shield logo on the outside, which means that the lighter is an armored 41, which means the shell is thicker than normal