I have one by Saxton. It bears Birmingham proof marks (not nitro proofed). Rather than an address, the barrels are marked "Laminated Steel" on a well-executed concave matte rib. I know next to nothing about the maker but, along with the owner's initials, the escutcheon is engraved "Sept 1904".
I've hunted with this gun, but I stopped that when while cleaning the gun I noticed what is either a 2" scratch, or a crack in the left barrel. It's impossible to differentiate when viewing from the breech, even though it's just ahead of the chamber. I have a cable camera with a right angle attachment, but I can't focus to a clear image within the confines of the narrow barrel.
I don't have any pictures of it at the moment, but I can probably take a few and post them over the weekend.