Photo by Don Smith, North Bay, Ontario, date unconfirmed.
CN GP9 #4503(GR-418c) built in 1956-57 is pictured here with another GP9 and what appears to be an RS10. CN's geep nines have undergone a lot of change over the years, including some being cut down for "slug" traction units. The 4503 was remanufactured and renumbered to GP9rm 4023 in 1984..