W.Richards muzzleloader

Question
I have a dble barrel muzzleloader that was my great-grandfathers
gun. I have attempted to do research on this gun and have run into a lot of trouble. On the top of the barrel it says "fine twist." I removed the barrel from the stock and there are markings on it. At the beginning of the barrel it has a "CG with a V shape stamped. Then across from it there are the letters "HL" which are very small stamped. There are other stamped markings such as a BW in parenthesis, a *z, 5 hash marks (/////) and then there are 4 straight separate lines. There is also either a 134 or 184 stamped (hard to distinguish) and then below it's stamped with almost like a scroll marking. At the end of the barrel there is a number 125.Any ideas on the age, origin and value of this gun?

Answer
Twist means is Damascus twist steel which means black powder only.
If it doesn't say Liverpool, Birmingham or London, its not a real Westley Richards shotgun.
Westley Richards are collectable English shotguns.
W. Richards is likily a Belgium made knockoff.
Its about 105 years old or older.
There were other knockoffs as well.
Any seasoned gunsmith should be able to ID it in person.
If it is a knock its worth $100 to $300
If it is a real Westley Richards shotgun then its $500 to $2500.