I have a silver face Bass 350 in good condition. I don't know how to tell if it is pre-fender or what the difference is if it is. I bought to use as a backup but decided I could use the cash or a combo instead. Pictures of it can be seen at: www.provide.net/~eddie/swr350 There are a few scratches, a couple screw have vibrated out of the sides, and the chrome is peeling on one of the handles. But the amp still plays solid. I'll even throw in a brand new 12AX7 preamp tube. I'd like to get $300 or to use in a trade toward a good 12" combo. I also have a used RANE DC-24 dual channel rack compressor to back the SWR350 up for a trade.