HEAVENER OK April 1977 -- Kansas City Southern SD40-2 637 handles a mixed freight on a foggy day. The 637 was the first SD40-2 built and KCS's first SD40-2. It was built by EMD (s/n 7226-1) in Jan... (more)

KANSAS CITY KS March 10 1979 — KCS SD40-2 637 departs the yard with a mixed freight. The 637 was built by EMD in January 1971. My photo. - - - - “KCS (Kansas City Southern) #637 was t... (more)

Southbound KCS train near Hatfield

Four SD40's KCS 637, 651, 644 & 620 East Bound To NS Inman Yards