Andy Sperandeo MODEL RAILROADER Magazine
here is a URl showing a PRR B unit end. Different from what I remember but it must be accurate.
http://images.google.com/imgres?imgurl=http://nepa.railfan.net/breakers/pbs4.jpg&imgrefurl=http://nepa.railfan.net/breakers/pbshark.htm&h=355&w=438&sz=21&hl=en&start=3&tbnid=uJWEl63wIUixuM:&tbnh=103&tbnw=127&prev=/images%3Fq%3D%2522prr%2Bshark%2522%26gbv%3D2%26svnum%3D10%26hl%3Den