You will have to call Browning.
With the serial number that you provided,your Browning superposed shotgun was made in Belguim for Browning in the year 1955.
Receiver
The 72S suffix to your serial number indicates that your Browning superposed shotgun was manufactured in the year 1972,by FN of Belguim for Browning.
Your browning superposed was made in 1968.
No
The browning superposed shotgun was first made in 1931.the serial number run began with the serial number 1 and ended with the serial number 2,000.
1973
Your serial number of 15232 indicates that your Browning superposed shotgun was made in the year 1938.There were 1999 made that year starting with serial number 14,001 and ending with 16,000.
your browning shotgun was made in 1963.
Your Browning lightning superposed shotgun was made in the year 1968 with the serial number that you have provided.
1935
1950 Superposed.