Not saying there aren't others who know their stuff about Frejus, but I know iab loves the marque and has done quite a bit of research. Citoyen du Monde likely knows quite a bit also. iab may be out of pocket until Monday if he went to Cirque.

I'll be watching this thread also, as I have an interest also - borne of seeing a lovely trio of them in my uncle's bike shop around 1973.