Many thanks for the info, it confirms what I have already been sent by Jobo. The enlarger is clearly marked C6600, but it certainly has a clolour head, with cyan, magenta and yellow controls. Maybe it has been upgraded from a black and white one. I will check the head carefully if it has a transformer inside it, otherwise I will buy one from Maplin. Jobo could not provide me with a manual, so if anyone out there has access to one that I could buy/borrow/scan/photocopy, I would be most grateful.
All the best to the analogue photo community.