CN SD40 5173 at Jasper, AB in fall 1978.

CN SD 40's 5173 and 5135 leave Jasper, AB in fall 1978.

CN SD40 5173 trails the 5135 as they leave the Jasper, Alberta yards in the fall of 1978. Both locomotives were retired in 1997, and rebuilt as SD40-3's by Alstom. They were re - leased back to CN in 1997 with the 5173 ultimately becoming the CN 6902 (sub lettered for WC) while the 5135 became the GCFX 6043.

Canon Pellix - Kodachrome