Does anyone know anything about the AFC?

I have one troy once of .999 silver. It says AFC champion 1994 on the front and It has a helmet with lightning bolts on it. Here is what the lightning bolts look like: http://www.picturesdepot.com/photo/36546/picture+of+san+diego+chargers+helmet.html On the back it says Jack Murphy Stadium and it has a picture of Jack Murphy Stadium on the back. The copy right is �/TM 1995nFLP. I'm wondering, how much is it worth if I sell it to a sports collector?