CTA Surface System History presented by the Illinois Railway Museum
Route Number 621
621 - Northbrook Local - 07/05/1977
621 - Northbrook Local - 01/03/1978 - Image Courtesy Bob Bourne
621 - Northbrook Service - 06/19/1978
621 - Northbrook Service - 03/05/1979
621 - Northbrook Service - 06/15/1981
621 - Northbrook Feeder - 09/10/1984
621 - Southwest Northbrook Feeder - 02/10/1986
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