Rust bluing or blacking on British guns barrels was rarely if never a "satin, dusky or dull" finish. 99% of the time it was highly polished, shiny blacking. For some reason, Americans got it into their heads that the proper finish for rust blued barrels was that satin, dull look. Not proper or correct.
What is "proper or correct" for British guns is not necessarily so for American guns. The British gun industry did/does not determine what was/is "proper" for the rest of the world. Aside from the fact that there is a very practical reason for some field guns to have a low lustre blue, what is proper for an American classic is what was originally put on it when built, whatever level of polish that might be.
The whole world does not shoot driven birds, and a low lustre blue is much more practical on a dove field when birds are coming in to feed from all directions and may be turned by the reflection of a highly blued barrel.
SRH
