It sure looks like there should be a drum head there, but maybe they skimped and re-used the same structure without including the drum head? It obviously looks bare without it with those 2 holes.
Was the back of the observation car pictured in the catalog to show off a drum head?
If I otherwise liked the set and just wanted to know if they screwed up and missed a part on mine during manufacturing, I'd try to figure out if all of them were like that, or just mine (ask Dealer to check another one? or ask Lionel if they included it in the design?).
-Dave
