Looks a lot like the internals on my old James Lang BLNE with the dickie bird safety except yours, I believe, has better lever work. Pictures are in the thread below:

https://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=446295&page=1

Last edited by Dan S. W.; 04/09/20 05:56 PM. Reason: typo