Dustin, I don't think these guns share the same Beesley patent.
I did find reference to a patent taken out by Thorn in 1881,#499 that pertains to the "wrist-breaker",I can't find a picture of it so I'm not too sure about it.It uses the rear lug to cock the tumbler,and is probably a bear to close.
And by the way that is a a beautiful gun you have, Justin

Last edited by justin; 03/17/11 03:11 PM.