"I think you'll find it was a Vox AC30. I seem to recollect he also used a Baby Binson, sometimes on its own, sometimes with the Meazzi Echomatic."

Yes I think you are right, I hadn't realised that the changeover to AC30 was in 1958, and I never knew that there was a one speaker AC30 before they changed to 2 x 12" celestion blues - I have 2 of these in a cabinet which I may use one of these days!