Now THAT is a great find, along with all of the pictures.
In 1860, Forsyth wrote of the Lefaucheux "principle" in breech loading guns and how it was the gun of the future.
I had one, an 1898 Model 20 Husky 16 bore, on the same basic Lefaucheux action. I think these were made into the
1920's or maybe even later.