AZL 1937 AAR 40' Box Cars. Features include etched walk ways, functioning doors, blackened wheels and Auto Latch couplers. What a nice little car for earlier layouts. This release represents the standard 1937 AAR 40´ Box Car. It is offered with Murphy raised panel roof, both Youngstown and Superior doors and the most common 4-5 Dreadnaught ends. AZL also offer the correct choice of wooden and etched steel running boards. This enables AZL to offer a very prototypical Box Car.