Anybody want to play “Name that Ferrari part?”

I was wondering if any of you happen to know what the Ferrari part is that I have attached pictures of. It is made of aluminum with threads on the inside and a rubber gasket/seal. I am assuming it is some type of cap for maybe the fuel, oil, radiator, etc. I picked up two of them from a store just across the street from the Ferrari factory when I had a tour back in September of 2000. Any information about what it is (i.e. what car it goes on, what it is called, part number, etc.) and/or what it would cost to get from Ferrari would be much appreciated. The reason that I ask is that since I have two of them, I was thinking of putting one up for sale on eBay, but I didn’t know what to label it as or what kind of price to put on it. Anyway, thanks in advance for any information you may have.

 

Yup, I think it is a fuel cap. I am not sure if it is a legitimate Ferrari replacement part, or it is something one of the workers nicked off the assembly line! Anyway, thanks for all the help. I will put one up on ebay tonight labeled as a fuel cap.