You have a set of very rare Techno's.
These are early '90 replica's of the originals, and they are most definitely NOT aluminium, but real magnesium. Not for sale since many moons, expensive as hell, and do not have them sandblasted or something. Real magnesium needs a different treatment.
I wouldn't dare race on the original Campo mag GTA wheels, and so do many other historic racers. On these however you can.
I would buy them immediatly from you. I have one set, in 7x14 and wouldn't sell for the world.
For ALUMINIUM replica's:
HEINBRAND AUTOMOTIVE
Classic Alfa Romeo cars
AFRA [Abogados - Attorneys at law]