If the gun in question resembles, very closely resembles a Dickson RA, then 99% sure it was made by Ferlib. If the gun is marked as a super light, has a scalloped frame, and looks like a rounded off box lock, it was probably made by Siace.
Never heard of the Siace/ICD connection either. Mario Beschi,yes. Siace no. Huh. Interesting.