Tricky that!
Without a matching picture, I only can throw in an educated guess.
Judging by the people and the engine I would rather place it in the eastern part of europe, as Kees told before.
4-cylinder inlines were not that common in France.
I'm not sure about an Argus engine - which more likely would be used in Russia, but it also might be a 65 hp Austro-Daimler or a Hiero engine.
The deep REP or Clement-Bayard-style fuse made me think of the monoplanes of the hungarian
Gaze Kolbanyi.
He also used a central skid and sometimes placed a gravitiy tank between the tombstones and his aircraft usually had underfins. I can't decide for one of his models but I would say it is a design from 1911 or 1912.
Cheers
Aquilius