Here is the Logo and a bus with the Logo on it for the Chicago Surface Lines and here is a chip with CSL. Now the question is, are they one in the same? The person I bought the chips from says yes because he bought the chips from a chip collector in the 70's at a garage sale in Chicago. Along with the chips was a borchure with the Chicago Surface Lines information. They started out with electric rail cars from his brochure but ended up with electric buses from what I can find out.

Thanks for Looking...........Rog