I inherited a p38 recently and Ive tried to Internet sleuth and research it but I'm in over my head. AC code looks sanded and refinished over. e359 stamps are in place on slide, barrel, and block. 5 digit serial number but the 1 looks out of place to me. has the Austrian BH and a IAC stamp. serial is on the right side of the frame which people say means commercial model but it also has e359 stamps. any help would be appreciated