No apology needed, I was trying to imply the condition. My error in misleading.

Restorations are best left to the valuable named guns, such as a Holland or a Purdey or Westley Richards.

Besides, I am not a shotgun guy and know little about them!

My guess is this is a dollied up trade gun. It is anyone's guess where the gun was made or by whom. It is just something to hang on the wall along with those shed elk antlers. It would be fun to know the full story of the gun!
Thanks!