what is the age of a browning ranger repeating 12 ga shotgun serial number 45579 b
No browning did not,but winchester made a ranger model pump action shotgun.
You will have to call Browning with the sn to find out.
The Stevens Model 520 was built on a Browning patent and so marked. Stevens also built the gun for Sears before World War II under the 'Ranger' tradename, so if you have a slide-action shotgun marked 'Ranger' and 'Browning Patent' then that is what you have.
No not to my knowledge but Winchester did.
Can't answer without knowing if it is a rifle or shotgun.
100-300 USD
Ranger on Browning Patent This was sold by Sears , but made by Stevens between 1912 and 1942. It was not made by Browning. Typically they are valued between $100-$250 depending on condition.
50-575 usd
No sn data in the public domain.
Browning did not manufacture the gun. The gun was made by Stevens, using a Browning patent. Value is minimal, below $200.
On line, want ad, for sale ad, gunshop, gun show, pawn shop.