Like I posted on the other thread with this image, interesting re-enforced proof that I don't remember seeing that often. I don't think it to be true double proof?
Kind Regards,
Raimey
rse
Re the proofmarks, I initially read them as two of the same on each barrel, but closer inspection shows them to be different. The only reference I can find to the left hand mark with the capital E--not sure I've ever seen it before--is to a black powder proofmark that was only used from 1869-79. That would mean the gun has had only the standard proof. But one source I have states that the right hand mark replaced the left hand mark in 1879. Interesting.
Otherwise, the gun looks to be an example of a very plain French boxlock.