Without any more information, you question is almost impossible to answer with any real degree of accuracy. Value will depend on where you live, how bad you want to sell it, condition, finish, accessories, box, papers, engraving, detailed description of all markings, stock wood, etc.. You could be in the 100-1000 USD or more range.
What are you asking?
You will need to call Browning with the sn to find out
50-175 usd
50-5000 usd
1976
YOu must call Browning. SN does not follow normal convention.
Made in 1981.
It really depends on the model
$400-$500 in excellent condition.
Never made in Belguim
made in 1976
value of belgium browning 25 auto baby blued with walnut grips