A.S.N. stands for Army serial number.Starting in 1940 the number 3 as the first digit meant he was a draftee.The 30,000,000 range of serial numbers were for the Fifth Corps,headquartered at Fort Hayes,Ohio.Members of the Fifth Corps were from Ohio,West Virginia,Indiana,and Kentucky.I don't know how you could find the owner by the serial number.How did it get to be there?Maybe he was digging up a relic!