Then just re-branded them like Alan bike’s that seem to have everyone’s own stamp on them?Looks similar to the early carbon Peugeots and Kestrel frames. I can't remember the company that made them - Aegis?
I’ve seen this on a Rossin Facebook forum but apparently it’s not a c4.There was an Italian company that marketed a carbon frame that looked very similar to this Rossin , the model name of the frame was "C 4" , trying to think of the manufacturers name .