On the "If you want blood" Live album, which is made up of material from "The powerage tour", Cliff Williams is using a Sunburst Precision bass (although a Black/or dark purle one has shown up). It has a maple fretboard, and a golden (adonized...? Whats the term again?) pickguard. His amplifier set up is an Ampeg SVT with Two 8x10s. He has roundwound strings if i am not mistaken, and primarily uses a pick during this period. However, using your fingers will work just as well.
He also uses this same precision, except it is missing alot more paint, during the Razors Edge tour, where it alternated with a Stingray.
If you have any other questions, ask away.
Thanks.