The following action looks like a standard H&H. But it has a self-opening mechanism somehow incorporated into it. Whoever made seemed to know what they were doing. I have marked up some of the movement and parts in different colors for reference and discussion. The yellow part is what I don't understand. I know it is supposed to be a self-opener, but it is very different from the Beesley and the Bury.
What is it? Who invented it? And how does it work? I am at a total loss....
Thanks in advance for any information you can provide....
