I agree with all the above.
This knife is a proper knife, from the turn of 1900. They are very common and most of the time very cheap, the price of a cigarette pack.
They are from the same family of the flyssa with a large wooden hilt and a European naval cutlass guard. They are also similar to the weeding nimcha or weeding flyssa as you wish.
Some of them look earlier, like the one with the Ottoman low grade silver sheat (with berber design), from the end of the 19thc.
The French were in Algeria since the 19thc. As I already said the tourist thing means nothing otherwise you can remove half of the Indian weapons from this forum.