Wells Fargo Coach Gun

This is an old coach gun my dad got a hold of a while back. An antique collector he knows bought an old steamer trunk with all the contents included. The man didn't look through the trunk until he got it home. He found this old shotgun in the bottom of the trunk. On one side of the stock, it has carved "WELLS FARGO EXPRESS" and on the other side it has carved "JEB ADAMS AGENT" The gun has no other markings except a small crown inside a shield on the top of each barrel. The metal appears to be some sort of Damascus(did I spell that right?). Price is negotiable.