SD40-2 952, U30B 866 and SD40-2 950 by Frisco.org Posted on February 19, 2016 SD40-2 952, U30B 866 and SD40-2 950 SD40-2 952, U30B 866 and SD40-2 950 at Webster Groves, Missouri on October 3, 1979. This entry was posted in RT Collection and tagged 866, 950, 952, Electro-Motive Division, General Electric, SD40-2, U30B. Bookmark the permalink.