No action made of leather. If you mean LEVER action, that would be the BLR. 100-500 USD
Try the barrel, action, breech
100-500 USD
Hexagon barrel what? Model? pump, rolling block, ?? Condition?
Check the receiver and barrel.
You will have to provide the model, type of action, barrel length, gauge
50-600 usd
You will need a gunsmith to assist with measuring.
Open action remove pin remove slide,barrel,spring.
No way to answer without a detailed description of all markings, gauge, barrel length and type of action.
Although both are interchangeable, a true Sweet 16 barrel will have three holes drilled through the barrel band. This was one of the ways Browning lightened the barrel. The rib will also be a smidge thinner than on a regular barrel.
You will have to ask Browning.
The gun was made in 1900, the long hexagon barrel is not unusual for that era.