Here are some color photos for comparison.
This is a brass Williams GS-4 followed by a MTH box car at Coupler Curve.
This is a K-Line 21 inch business car on the end of the same train.
This is the brass Williams GS-4 once again at Norris Falls.
This is a brass 3rd Rail Mountain followed by a MTH box car and MTH dome car at Lizard Peak.