Here is my newest. Picked it up at the Milestone auction a couple weeks ago. I think this may be the only one of these early Casimir Lefaucheux-made guns I have actually found in the US.
This was likely made in 1834 (+/- a year) and follows Casimir Lefaucheux's 1833 patent for his new breech-loading design. (this patent:
https://lefaucheux.com/archives/ext...rm-by-casimir-lefaucheux-no-5138-1833-2/)
Then sometime after his pinfire patent in 1835 (
https://lefaucheux.com/archives/cas...for-pinfire-cartridge-innovation-1835-2/) it was converted to accept pinfire cartridges.
![[Linked Image from photos.smugmug.com]](https://photos.smugmug.com/photos/i-gqCH94v/0/LT2d9JZrbFp6QM76dGDMknfrJqNHRgLn3jm9WCCF7/4K/i-gqCH94v-4K.jpg)
It originally would have accepted a variation of this early percussion cartridge (
https://lefaucheux.com/archives/historical-innovation-the-primitive-lefaucheux-percussion-cartridge/)
![[Linked Image from photos.smugmug.com]](https://photos.smugmug.com/photos/i-Cvdwrsc/0/NVnLTL4vxnKJKwfWJsQz36Dwsq7krgRv4xqg22cjb/L/i-Cvdwrsc-L.jpg)
Which in 1835 the French Society for the Encouragement of National Industry described as following (translated):
You understand, gentlemen, that by adopting this principle of closure for rifles, it is not a matter
of opposing the leakage of a liquid, but that of an ignited gas, it was necessary to modify the
material of the obturator; so it is not a leather cap, but a thin copper bottom that Mr. Lefaucheux
covers his cartridges with. The flexible edges of this cap, which has the shape of a large
capsule, expand at the moment of explosion, and apply against the walls of the barrel with such
accuracy that, from now on, the slightest leak becomes impossible.
This means, as simple as it is ingenious, which an observant spirit has borrowed from hydraulic
press closure to make a happy application, deserves your attention: we regard it as one of the
most useful improvements made for a long time to hunting weapons loaded by the breech.
In our opinion, it is a real service rendered to the entire field of gunsmithing; by its use, the
combinations of closures less precise will be sheltered from gas leaks, and from now on it will
not be the exactness, but only the solidity of the closure, which will make the problem of the
manufacture of breech-broken weapons difficult to solve.
(
https://lefaucheux.com/archives/det...ge-innovations-and-firearm-designs-1835/)