Atlas HO TRAINMAN 1937 AAR 40' BOX CAR UNDECORATEDAtlas HO TRAINMAN 1937 AAR 40' BOX CAR UNDECORATED Part Number: 843375039745 Description NOTE: This car is undecorated and the image is for reference only. Atlas HO TRAINMAN 1937 AAR 40' BOX CAR UNDECORATED The 1937 AAR Box Car is widely recognized as the first standard freight car design to be voluntarily adopted by the majority of railroads throughout the United States. Although previous USRA designs also achieved widespread distribution, their