This is a 16ga 2 3/4 Belgian made auto5 made in 1949. It could be a Sweet 16 which is the lightweight version or a Standard weight gun. See the link below on values. What other information would you like to know?
Browning offers history letters.
No way to tell. The sn you list does not follow the standard Browning system listed here http://www.browning.com/customerservice/dategun/detail.asp?id=13
You will have to carefully note exactly how the gun is marked, first.
Your browning 16ga was produced by browning in belguim in 1949.
That is not the complete serial number. Value is going to depend on condition, and without further information is impossible to guess.
It is a Stevens shotgun, based on a Browning patent. Inexpensive.
Your browning auto-5 standard 16gauge shotgun was made by FN of belguim for browning in 1953.
It will be marked on the barrel. The barrel is marked "Made in Portugal".
Marked on the barrel.
Might have been brought into the USA by a service member.
This is a Belgian made A5 which is a Standard weight 16 gauge made in 1956.
e They are marked on the barrel.