Caption: I'm not sure of the reason for this..but on a nice clear morning in March 1972, I found CP RS3 8439 accompanied by TH&B GP7s 77, 73, and 75 at the TH&B's Chatham Street roundhouse. While RS3s where commonly used on the Goderich sub train in the mid-late 1970s, pairs of SW1200RS units were more common in the early 1970s and this would be an odd way to pick up or leave a unit at the roundhouse. Perhaps a delayed Kinnear?
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