I've personally seen exactly two 6 gauge guns Ed. They were part of a display of large bore single shot and double barrel guns that I saw at a Pennsylvania Gun Collectors Assn. gun show in the early 1990's when that was a very large show.

They were both double barrel hammerguns, and think one was a breechloader. I don't recall any other details. It appears 6 ga. guns in any condition are now quite scarce. I hope we'll get to see a photo of your gun.

Voting for anti-gun Democrats is dumber than giving treats to a dog that shits on a Persian Rug