Question concernant des machines à calculer

J’ai une question !

I’m trying to fix this old add-machine (see picture), but unfortunately there aren’t any reference on it(Model/brand name/serial nr.). I’m looking
to found any kind of instruction too, but/and also my web search to recognize it wasn’t proficuous.
If you need more info I’ll try to give it, underling that I’m not trying/proposing to sell it, but II’d like to repair its function,
So any help to at least identify the model could help me to refine my search/journey to fix it.
Merci pour votre aide.

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