10-1000 USD depending on specifics
Hexagon barrel what? Model? pump, rolling block, ?? Condition?
Look on the receiver and/or barrel
The gun was made in 1900, the long hexagon barrel is not unusual for that era.
You must provide the serial number.
Not too old judging by that serial number. It is a more recent purchase.
Under the barrel on the front of the lower frame
You may have to break the shotgun down in to the barrel section and the receiver section first.Look under the barrel section on the flat just ahead of the lug for the serial number.
You need to provide caliber and any barrel markings (i.e. Savage Arms etc.).
You can get the serial number off the barrel and then go to the following website to find out the age: http://www.savage99.com/savage99_dates.htm
The value of a Savage Fox model B series h double barrel shotgun with a serial number of B611255 depends on its condition. This gun in excellent condition is valued between 199.99 and 275.00 as of 2014.
You can get the serial number off the barrel and then go to the following website: http://www.savage99.com/savage99_dates.htm
Try looking at the frame, receiver, barrel