Howard Leigh’s Planes of the Great War has an illustration with this cowling, engine mounting and engine.
I think it is a Nieuport two seater. Made by Soc. Anonyme des Etablissements Nieuport.
The text says a hole was left in the top wing so that the passenger could stand up and fire over the air screw. This procedure caused the machine to lose height, as it was underpowered. For this reason it did not long remain in service. This two seater was the forerunner of all the successful Nieuport biplanes
Nick.