The man with the white coat and mustache on the 1969 Motorcycle Mechanics magazine cover and also on the cover of the 1969 Motorcycle Sport was Arthur Carter. He was Honda UK's Service Manager then. The holy grail for me would be a video clip from the BBC TV programme from early 1969 called 'Wheelbase', which featured one of the two p.p bikes and had Lord Denbigh as a guest (He was of course the 1st owner of the gold bike). From my 'research' the bike was, I believe, ridden and presented on the programme by Alf Briggs, who ran Honda UK's Service Dept in Nottingham UK and the two p.p.carbs I have, I have since found came from Alf's estate, when he passed away in his 90's.