NW2 254 and SW7 304 by Frisco.org Posted on May 6, 2018 NW2 254 and SW7 304 NW2 254 and SW7 304 at St. Louis, Missouri in November 1979 (Ken McElreath). This entry was posted in KM Collection and tagged 254, 304, Electro-Motive Division, NW2, SW7. Bookmark the permalink.