I'm thinking it might be Commander Whitehead, who was the President of Schweppes (tonic water, club soda, etc.). He was also their TV spokesman back in the 50s and 60s - remember him talking about ?Schweppervescence?? I don't know if his picture was on their bottle caps, but it sort of makes sense. I'm not sure I know how to, but I'll try to attach a picture of him I got off the web.