Thank you for all the responses
If've found some French catalogues that says that the French sold top-models had Huret, and I if it's a Huret Success like I think that would mean top-end-French. (After all I do own a French sold Peugeot PX10 with Simplex)
See the C41 in
http://en.calameo.com/read/000052438b1be575166eb and
http://en.calameo.com/read/000052438aab92476138e
I'm glad to hear about the badge, as that's one thing I hadn't seen on any other and made me suspect it might be repainted.
One thing that stands out when looking at other C4s, is the crank which should be drilled.