by TomNelligan
Herbert Matter was the graphic designer responsible for both the NH and B&M colors and logos under their respective McGinnis regimes, and he was indeed Swiss by birth. He was fairly well known in the industrial design world and you'll find a lot of Internet references to his work. One rail-specific one is below.
http://www.gis.net/~fm/mcginnis_graphics.htm
http://www.gis.net/~fm/mcginnis_graphics.htm