I can not find a number that matches that on the Browning website. The closest seems to be the Fabrique Nationale manufactured guns in 1953; however, those serial numbers only go up to 438000 and there is no "1-" at the beginning that I can tell. If it is any consolation, my own Browning 20 gauge serial number does not appear in the list either (7Z 21385). It may be worth while to call 800-333-3288, the Browning customer service line. I plan on it. The serial number website for Auto 5 shotguns is:http://www.browning.com/customerservice/dategun/detail.asp?id=13
YOu must call Browning.
1973
You must call Browning.
Falls outside recognized data. You will have to call Browning.
1931
1950
1950.
You will have to call Browning with the sn to find out.
your browning auto-5 shotgun was made in 1929.
1924
1971
1966