Now sporting modern CN colours as well as a pair of spark arrestors, CN G12 991 is seen parked at St. Thomas in 1969, not too long before being sent out west to BC with former LP&amp;S &lt;a href=http://www.railpictures.ca/?attachment_id=36586&gt;&lt;b&gt;sister unit 992&lt;/b&gt;&lt;/a&gt;. There were subtle differences between the two units, including truck type and cab style.