Help Identify Proof Mark?

[cbud]

I was recently gifted an old muzzleloader, but unfortunately there was no information available pertaining to its origin.
I'm hopeful someone can identify the proof marks and provide some background info. Thanks in advance.

 

[hawkeye2]

The proof marks are a good place to start and you have provided nice clear photos. The lock is a later replacement for the original and the tang (female part for the hooked breech) is missing. Some more photos would help.

 

[Capt. Jas.]

You have a gun that was put together with a barrel showing the maker's mark of Richard Wilson and the proof and view marks are of the London Gunmakers Company

 

[Mulebrain]

There is a key to British Proof Marks

http://www.nramuseum.org/media/940944/proofmarks.pdf