The earliest Ferraris used a simple hand former aluminum scoop. The later 166s had a cast aluminum “Ram’s horn” assembly with a louvered aluminum can at each end. This assembly was made by the Weber carburetor company in Bologna. Most of the aluminum castings have a small tag riveted to the top surface at the center. Some did not. The very early street cars used only a single carburetor but this configuration was soon changed to the more familiar three carburetor set-up. Early Weber “Ram’s horn” air cleaner tag.
The very earliest cars used the Magneti Marelli B-5 coils. These coils were black and had the mounting bracket spot welded onto the black metal can. The B-5s had a small vertical slot on each side of the mounting bracket. The end tabs of the aluminum tags were inserted into the slots on the mounting brackets. Rivets were not used on these tags. These coils were used on only the earliest cars in the late 1940s and early 1950s. Etched Magneti Marelli B-5 coil tags.