Need advice on a very old gun.
I have an opportunity to purchase a Hollenbeck 3 barrel shotgun. I believe it's a 12 gauge SxS over a 30/40 caliber and it's in very good condition. It has Damascus barrels and from what I've learned it was made between 1901 and 1903 in Wheeling, West Virginia. It has nice engraving and even comes with the original carrying case which is in not very good shape. All serial numbers match. The only thing I see wrong with it is a very small dent in one of the barrels on the outside but it's not noticeable inside. All 3 bores are very clean. Any guesses on how much it's worth?