This is just an educated guess but I think the Brazier stamp indicates that they made up the action and locks and most likely supplied them in-the-white to Henry.
Numbers like this I have seen on many guns, mostly on the barrel flats or between the flats and forend loop. They sometimes have the same numbers stamped on to the action flats.
I have always assumed that this was a variation on the usually single digit or notches cut in component parts to keep the parts of a gun together through the early manufacturing process.
A gun that springs to mind is a Blanch BLE that I have still have which has double digit numbers on flats of both action and barrels.
Although they may have been struck off during finishing, it might be worth having a very careful look over the major components of the gun to see it the same numbers appear elsewhere.
Best of luck in your search!
