Famous is a trip to London, which Johannes, the eldest son of the 3rd generation undertook on behalf of his mother: It was to follow his father to prevent him from buying a London cab for the glacier view. Some sources, by the way, report it the other way around: the mother had sent the father to prevent Johannes from buying a "Black cab" in London. Whoever is right, the result remained the same: father and son came home right away with two London Taxis.