Note that the unit is painted in the CB&Q switcher paint scheme, lettered for the C&S and AT&SF. The C&S and AT&SF had an arrangement where each road supplied a few locomotives to a pool, and one crew (and locomotive) would handle the switching chores for both roads at Denver and at least as far as Coloroado Springs. Locomotives lettered C&S AT&SF (top to bottom, or, left to right) were owned by the C&S and manned by C&S crews. Locomotives lettered AT&SF C&S were AT&SF owned and manned.