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?
A few hundred to a few thousand.
If you mean a Citori; 100-5000 USD
100-1000 or more depending on specifics
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