OK, I found it.
It says on the Box--CDC Malossi Prese aria a cornetto, made in Italy, Calderara Di Reno (Bologna)
It is polished alloy, OD on the end where the female threads are is 55mm, ID before the threads start is 52mm. Diameter at the Bellmouth is about 77mm. It is pretty flat, about 22mm from front to back.
I have a pair. If I recall correctly, I won these at a uscra event, and they were donated by Vintage Cosmo.
If you want them, just $10 delivered to your door.