Very nice Feltwad, but the British have always had a more practical approach, each owner will make sure a gun fits while here it stays unshootable because its in original condition. (at least for classic shotguns)
the fact is, baring more regulation - its each their to own, hopefully as long as it does not damage the piece.
I was at an antique show this weekend, one dealer had something for everyone
at the bottom, literally, late back action percussion swivel breach that was as found - and it was found in a very wet basement, a thick layer of orange rust and no finish on the wood.
Then, a nice NY full stock percussion rifle, with a provenance to a upstate NY historic house's owner. in "attic condition" very nice patchbox with "patina", a dark what looked to be original finish, you could just tell there was some nice wood under there. personally - I liked that one, the house is now a museum and I have wondered about contacting the curator
And lastly, a PA percussion fowler, spit and polish - wood refinished, not a nick or dent left in it, the brass shined up and the barrel cold blued and just starting to show the lightest handling marks. If it looked any newer I would have expected to pull the barrel and find GETZ on the underside. (still might check, it was too good) I thought about it as a shooter (still am) but any character was gone.
which was right? If I was going to get to make all the decisions, the swivel deserves some restoration, the full stock is great as is, and the fowler? really over done.