The later 275 and 330 desings reverted to the crescent-shaped aluminum tags as had been used on the earlier inside-plug 250 cars. The filter element number that is stamped in the “Tipo” block on the tags has changed from “AT4094” on the inside plug 250s to “2228.01” for the 275/330s. 275/330 crescent-shaped air cleaner tag.
Ferrari made a small series of Super cars in the late 1950s. The larger engines required a larger filter element and a different tag was used. This one has the word “RETEX” (net or filter) in the center of the top line. Super America crescent-shaped air cleaner tag.
While the 250 series race cars were well-known for the beautiful six two-barrel Wber carburetors the normal “street” cars used “only” three two-barrel carburetors and the large “three-in-one” air cleaner assemblies still supplied by F.I.S.P.A. These had satin black-painted tops and bottoms with nickel-plated perforated steel side panels. The “inside plug” engines and the outside plug engines used this tag and a few other details until the GTE production began. They had the two-ear wing nuts on the air cleaner tops, silver-painted timing chain covers and these metal air cleaner tags. I have seen these three details on cars as late as #2039 and I think that the change to the F.I.S.P.A decals, black wrinkle timing chain covers and three-ear wing nuts was made about that time. “inside plug” air cleaner tag with 70mm rivet spacing.