CTA Surface System History presented by the Illinois Railway Museum
Route Number 503
503 - Black Road-East Washington - 05/1978
503 - Black Road-East Washington - 04/02/1979
503 - Black Road-East Washington - 12/10/1979
503 - Black Road-East Washington - 06/09/1980
503 - Black Road-East Washington - 02/16/1981
503 - Black Rd-Raynor Pk - 11/23/1981
503 - Black Rd-Raynor Pk - 04/26/1982
503 - Black Rd-Raynor Pk - 01/31/1983
503 - Black Road-Raynor Park - 08/22/1988
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