If its a 12 ga, then it was made in 1961
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 lightning superposed shotgun was made in the year 1968 with the serial number that you have provided.
Your browning superposed was made in 1933.
With the serial number that you provided,your Browning superposed shotgun was made in Belguim for Browning in the year 1955.
You can, but, you will cause a barrel bulge after a while.
HI, the gun was manufactured in 1969, Carl
Superposed
Your browning superposed was made in 1968.
Browning.com has a sn fucntion under customer service.
Receiver
No, they are not.
You will have to call Browning.