It has a visible hammer (or two).
Hammerless
bands of iron were wrapped around a mandrel and hammered.
50-100 USD
Try e-gunparts.com
about $3500
You need to give serial number.
The Model 1878 was offered in 10 and 12 gauge from 1878 through 1889.
Wesson Fire Arms did. Values can range from 500-10000 USD dependig on EXACTLY what you have and how it is marked along with condition.
yes it can be hammered into place because it is a metal but non-metal can not be hammered into shape.
Hammered is a verb in that sentence.
An element that can be hammered is called malleable.
no because oxygen cannot be hammered