text: i have a over and under browning superposed 12 ga. shotgun im trying to find out when it was made.  s.n #52479 i have a over and under 12 gauge. and im trying to find out when it was made. on one side of the barrel it haspatents no. 2203378-2233861 made in belgium. and on the other side it has browning arms company st louis missourri. special steel 12 gauge shells 2 3/4" serial number is 52479. thank you. 48,001 - 54,000 made in 1956.