Is the E B an E B ?
that did cross my mind. It could just have been resprayed by EB (the paint looks newer than the frame) and re-badged, although I have seen EBs of that period with wrap-over seat clusters. I guess the frame number would give a clue. Should be 4 digits under the BB probably starting with a 5?
The Witcomb looks repainted too, so probably would require further enquiry if anyone was seriously interested.