in Lawrence Cohn's book Nothing But The Blues, there's a picture of EJ that he claims is the oldest known. He's playing what looks (in a VERY bad-quality picture) like an old Kay electric. The name plate is hard to make out, but it has a dreadnaught body and has two tone/volume knobs on it. Don't have time to look through the rest of the book right now to see if there are any other shots of him in there with other guitars.

cheers

david