Well France and Germany have been ruled out, but I think I see influences of both, so I will guess Switzerland. Fortunately, if I am correct, I can find only two Swiss cyclecar manufacturers in the correct time frame (about WWI). The puzzle car doesn't resemble the only photo of an Egg that I could locate, and I can't find any photos of a Speidel. Therefore, I will have to venture a guess, and say that, if the puzzle car is actually Swiss, it is a Speidel from about 1916.