Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

I believe this is probably from the 1890s and definitely French, but know nothing else about it. Can anyone i.d.it? I suppose Radiguet and Pericaud are possibilities. Any why so many terminals? Lastly, what is the function of that vertical rod in the photo--runs with or without it making contact. Thanks for your help.

https://youtu.be/udtEpom3BQM?si=nqQK5FHhqhvI0ZU0