SW7 79 (Frisco 304) by Frisco.org Posted on November 2, 2018 SW7 79 (Frisco 304) SW7 79 (Frisco 304) at St. Louis, Missouri on August 1, 1981 (M.A. Wise). This entry was posted in BN Patched, RT Collection and tagged 304, 79, Electro-Motive Division, SW7. Bookmark the permalink.