F7A 31 and U25B 817 by Frisco.org Posted on August 10, 2018 F7A 31 and U25B 817 F7A 31 and U25B 817 (date and location unknown). Posted in FT Collection | Tagged 31, 5031, 817, Electro-Motive Division, F7A, General Electric, U25B | 1 Comment