That is a lot of shotgun in very well preserved condition. Probably Sauer or Lindner. At a gun show in this area, that gun would be gone. I doubt seriously that the stock is "American Walnut" or that it is marked "Fine Twist". Obviously the seller is not making a specialty of this type of gun. Someone should bite the bullet. No mention of the bores that I remember, but if they are good, the gun is good.