I would need a much more detailed description of your Browning shotgun,to include the model number or name of the model of shotgun in question.I would also need the condition of the blueing,and wood to give you the answer that you seek.
A Bar is not an over under, and what do you mean by tooling master?
A Browning over and under is worth about $1,000-1,500 on it own and the fact that it's a Belgium made Browing increases the price significanly. I would say somewhere in the range of $500 to $750 more. The belgium made Browning is the most collectible and popular.
Browning Citori 12 gage over and under & a Browning Goldtrigger Light Twelve: How much are they worth?
100-1000 or more depending on specifics
A few hundred to a few thousand.
If you mean a Citori; 100-5000 USD
Value depends on condition and exact configuration. Value range from a few hundred to multiple thousands of USD.
100-2000 usd
100-10000 USD depending on specifics.
10-10000 USD depending on specifics
100-5000 USD or so depending on specifics.
800-1100 USD or so