Here's what Owsley said about old WOS stuff:
On collecting the Dead’s old Wall of Sound amps and cabinets:
•I hate to pop your bubble, but...The cabinet you bought is basically a nostalgia piece, something to brag about owning not using. It is just antique rubbish. It is not suitable for guitar, and was used only in a specially assembled line radiator. Moreover, if it is really one of the ones used in the system it is probably worn out- worthless even for that purpose. We replaced cabinets frequently during the life of the array- but ceased doing that toward the end. Any left are likely not good."
"Do not write so that you can be understood, write so that you cannot be misunderstood." -Epictetus