A straight axle ,independent suspension. Doesn't seem like those two should be in the same sentence , but here the are on the same car. A 1907 Sizaire-Naudin
I wonder how effective that set-up was? I ***ume it works similar to an old "plunger" style chopper frame.
That is the most unusual suspension I have ever seen. There is a later development in some British cars, called a 'sliding pillar', if I recall correctly, that works on sort of a similar concept, but without the transverse spring. Ray