Very difficult to say exactly, but same era trains as the 2 set numbers that bracket it. If the larger size box, it would have more track, switches and maybe an unloading ramp car, possibly even the camouflaged tunnel. Smaller size box would be a more-typical consist, possibly some soldiers of fortune thrown in. If the box has dividers, it would help as tank-flats, airplane cars, ramp cars required a larger compartment. The combinations can be endless, considering 3 different locos (CV, 897 and 500) 2 different tenders and assortment of cars. Sorry could not be of more help, but a boxed set would have to surface to answer, and even then, dealers could swap cars according to a customer's wants. J