I guess some are pretty well known, like the ones Carlton, Ford, Santana etc. owns. But there are still a few hundred amps out there, and some must belong to less known players.
Does anyone have any info like this at all? The photo site has pictures of several amps, many of them with serial numbers...that would be a start..
There should definately be written a book about Dumble, his amps and the owners!
tommy