You don't show all pictures of what I think may be the Ansell Patent locking mechanism. It consists of a thumb push opening button which depresses the locking pin between the ribs in the barrel breech which is shown on your picture Ansell 2. I have a cased bar action sidelock with that patent which was apparently made for a seller James Smyth who may have had a shingle in South Africa. Apparently, if yours has this Ansell patent, it is a fairly early gun. I think the Ansell patent locking mechanism did not find a lot of acceptance.
Your gun shows an under lever, which probably depresses the pin in the barrel breech in a similar way my gun depresses the pin with a thumb push button that looks sort of like a safety on conventional guns.
Daryl, how do you get the pictures to show up as pictures and not links?
