Browning.com has sn data under customer service. You can request a factory letter for @@ 40 USD>
Browning does not use those letters to designate engraving.
belgium browning bar II safari edition 30-06
It will be marked on the receiver/barrel.
Is it a bolt, pump or semi-auto? What are the markings on it? Serial number? Are you saying the only engraving is around the trigger? None on the receiver? Without knowing these answers, you might be in a 200-2000 price range.
by the serial number on the bottom of the receiver
You need the services of a good gunsmith.
Value depends on Condition and which year and model that you actually have. More information is required to help. Try the link below.
The barrel will have 'Made in Belgium' on it. The receiver can be dated by serial number.
on the bottom of the receiver
1980
Made in 1934.
Your gun was made in 1929 in Belgium. The Browning Arms Co imported Auto 5 shotguns fron the Fabrique Nationale plant in Herstal Belgium. At that time their HQ was in Ogden Utah, where the Browning Brothers were in business. 1929 was the last full year with the Ogden Utah address. They moved their US headquarters to St. Louis in 1930. Your gun is likely a Grade I with no engraving. If it has scroll engraving on the receiver it is a GradeII. The barrel will tell you the choke designation guage and "special steel". It also says "made in belgium" on the barrel. auto5man