Everything I've ever seen says it starts with "A" in 1949 and ends with "X" in 1970. No "O" or "Q":
http://www.wisnersinc.com/additional_info/stevens_date_code.htm [/quote]

You're probably right. I posted from memory, which ain't all that great anymore. Your reference states the code was not used on other guns, but I've seen it on singles and on a lever 99...Geo