Catalog just called this Mechanical outfit No. 42 - Collectors sometimes call this the rainbow roof set. The baggage roof should be black, the 52 roof should be green and the boxes should have the roof color on the each flap.

This particular set has a No. 17 with it which is somewhat unique with an American Flyer motor - tin wheels with rods. We're pretty sure that the set box with this set is INCORRECT, but it came with the picture.