Comlink, the only real one known to exist, A C3PO knuckle, A droid re-caller, and the droid part that the Stormtroopers found in the desert after finding the escape pod
This is from http://www.kurtzjoin...arsarchive.html
I don't know what this part is supposed to be, but this is a different angle then you see in the movie. Hope this helps a little.