Need help with a Zenith pocket watch

Hi all together,
this is my first post and it starts with a question. I hope that is ok. Normally I am more interested in wristwatches. But now I got here a watch from the inheritance of my grandmother. It probably already belonged to her parents, so my great-grandparents.

It says Zenith on it and on the back is a woman. Next to it is "Summer" in French. Of course, I know Zenith from the wristwatches. Defy and El Primero make them.
Is this pocket watch from the same Zenith company? Or was there another one in the past? Is this watch something special, or is this rather watch junk that no one wants to have anymore?
Does anyone here know anything about it?