KWK
Well, I don't consider myself and authority. More of a Hack. Worked on a lot of '66s (replicants) and some were originals. Studied a lot of known historical information and lots of anecdotal stuff about the 1966 and the Transitional Henry (there were seven known). That would indicate to me, Winchester was probably up to something.
The as shown sample example shows no obvious signs of having been put into service. Probably shot very little and kept in a gun cabinet it's entire life. I have no doubt it's authentic. Made by Winchester. It is also known, Winchester built proto- typical rifles and when they were finished piddling with them, they were sold. It's marvelous the rifle was maintained in such pristine condition.
I could, would, should, will, DROOL ALL OVER it. I have built several 1866 replicants to run 44 Russian. To have one on an original frame?? Priceless. Of course, I wouldn't turn down one chambered in 44 Stetson Central Fire neither!!
Play Safe Out There