Just a footnote to the discussion; France, a number of years ago now, declared Boutet guns to be in the national patrimony and has forbidden their export from Fance. They were the first guns that I am aware of, that sold for a million dollars or more in the twentieth century. Sorry to say, some of them were counterfeited and now it becomes 'buyer beware!' They are a bit overdone for my taste, but then Napoleon was bizarre in many ways.
Dick