Perusing the internet, I stumbled upon this interesting hammer gun. Not a lot of details and no pictures of the flats or proofs. The barrels are browned, but appear to be fluid steel (though the browned finish could be obscuring the damascus pattern I suppose). Wood appears to be refinished, but the metal looks fairly original. Has anyone bought through Wards?

https://www.wardscollectibles.com/viewitem.php?item=4068