A great locomotive! When EMD F7's invaded the Rocky Mountain turf these engines were designed for (both PASSENGER and freight assignments) in 1952, they were shifted to Calgary-Moose Jaw freights. Some reports indicate the 5900-5935 series (1949) lasted in service until 1959. Surprisingly, these locomotives were not preferred in those prairie assignments, because they were not fast enough. The CPR preferred Pacifics, either single or double-headed, as they had the desired speed. Not the locomotive most would have imagined.
Thank you for posting the pictures. Sunset 3rd Rail did a nice model of them.