Caption: You can't really see it in the photo, but this was one of those days where the temperature hovered around freezing, the roads slick, drizzle, ice pellets and mist so aggravating; all conditions right for a decent sighting. Second train of the day after arrival at First Line, just to the west of Guelph Jct. is this SOO lashup with 6622, 6450, and 775; the middle unit that elusive one of a kind "B" unit.