According to the Canadian Trackside Guide, this is the oldest snow plow still in service. CP 400879, 1910 model, is assigned to Bredenbury, SK. Her he is on the tail of a W/B manifest, most likely on his way to Alyth or Moose Jaw for servicing/demolishion. Compared to the local Wilkie/Sutherland snow plows, he easily stands out with those "lined" wings. Note the air hose connecting from the TTX IMS flat over the front coupler.