Hmmmm. I can't see any indication that the gun is connected to Churchill. I think what you have is a gun made in the U.S.A. using locks made by Stanton in Staffordshire and imported for that purpose. The use of Stanton & Co. indicates a date circa 1900. Looks like a new mainspring has been fitted as the work bears marks that would not be Stanton's handiwork. Unusual opening mechanism. Churchill did not start on his own until the 1870's and by then most of his output was hammerless with hammerguns with his name being very scarce. If it had originated in Britain it would have had proof marks as all guns for export had to be proof tested and marked accordingly. I think what you have is a gun that was built your side with some parts that came across the Atlantic. I would say that is was a well made piece in its day. Lagopus.....