I know that Lippincott & Margulies Advertising of New York in 1967 produced the new logo graphics package for the Great Northern called "Big Sky Blue". They also designed the Burlington Northern's "BN" Green logo pre-merger. My question is what New York designer produced the Penn Central mating worms logo? I know that it was designed by a Madison Avenue agency or it may have been created by a Philadelphia art design team. I read it in an Advertising Age publication at the time but can't locate the story or information to be correct. I am just trying to get to the truth. Does anyone have that information? If you can help. The PC logo was not designed in house at NYC/PRR. It was a Perlman Project. Locomotives were being painted as early as 1965 for the forthcoming merger in very simple paint schemes. Yellow numbers on PRR and white numbers on NYC. Funny that after the Conrail breakup CSX locos had yellow and NS had white!