SD40-2 6840 (Frisco 950) by Frisco.org Posted on June 2, 2016 SD40-2 6840 (Frisco 950) SD40-2 6840 (Frisco 950) at Kansas City, Missouri on April 23, 1981 (J.H. Harlan). This entry was posted in BN Patched, RT Collection and tagged 6840, 950, Electro-Motive Division, SD40-2. Bookmark the permalink.