Calibre 13-96 which is confirmed by Eterna Suisse. Looking at the details of this savonnette (pocket watch) box, complete with the original small boxes closed with glass topping. Detailing the brass closing of the box, people did have time to make and enjoy it. See it was possible made with 2 different kinds of hands
Info from Eterna Suisse:
Dear Mr Peter,
I was in the deepest basement of ETERNA.
The box is from the years around 1910-1920.
The movement is a 13″ savonette handwinding calibre 96.
We foudn the overvieuw in French.
This all I have found for the moment.
I hope I could help you.
Head of After Sales Service