The pen sits in his jacket. It goes everywhere he does. At night, while he sleeps, it rests on the bedside table alongside him. David Dein has been in business for more than half a century, and one of his earliest lessons was that it helps if you have a story to tell. And so now he holds it up to the camera: the Mont Blanc pen with which he signed Dennis Bergkamp, Thierry Henry, Sol Campbell and...