Jazzyla said:
That gun was in the warehouse in the first half of 1950
Starting serial was 288551
Ending serial is 306650
That was roughly 18,000 guns made or about 3000 per month, putting your guns approximate manufacture around February or March of 1950.
I could be wrong about your gun being Light 12, look at the barrel ring and see if the ring is drilled and the serial matches the gun, if so, it is indeed a Light 12, if it is solid then it is a Standard.
Your safety probably has 59 years worth of junk in it. Spray it with some good solvent and blow it out with compressed air, it make take several tries to loosen it up good. The front safety is the second generation/style of safety, and is a bit cumbersome to learn and use. I really like that style of safety, once I figured it out it was really a breeze.
If you have no intentions of selling the gun, value isn't important, and it is worth more in it's original condition. I wouldn't refinish it myself, but that is me. Pictures would be a huge help in assessing actual value if you really want to know.
texagun said:
The serial number is 3G22XXX
This gun was actually made in 1963 based on the 3G serial. They started with the #G/M/V style serial designations in March 1958.
Example:
Light 12
8G = 1958
9G = 1959
ect.
Standard 12
8M = 1958
9M = 1959
ect.
Magnum 12
8V = 1958
9V = 1959
ect.
and in 1968 they went to a 2 digit year code, 68, 69, ect until the end of Belgian production in 1976.
This info is directly out of the Shirley and Vanderlinden book, Browning Auto 5 Shotguns, The Belgian FN Production.
Another sure sign is to look at the grip checkering, if the two sides of grip checkering are joined like this:
then is is a very early/pre-1963 gun, if there is a gap it is post 1963