Earliest variation: all red with red  trim on windows and vents with  red pilots. The model below has black trim, black pilots and automatic couplers.

This example has the darker red (maroon) color with red window trim, black pilots with red trim and the roof trim is red/gold.

Although rubber stamped versions of this locomotive are always black, this is the only black one we've seen with raised lettering from the collection of Richard Roeder of Houston