
What brought the question up was my recent purchase of a 1871 Scott with rebounding Stanton marked locks. A fellow I shoot with has an unmarked British hammer gun that came out of Australia complete with the Kangaroo on the butt plate.
There is no way to age his gun because it is not marked by a maker.
We were talking and he thought his gun older than the Scott. I wasn't sure on the patent dates for rebounding locks but figured it was shortly before the production date of my Scott.
Thanks for the info.