American Association of Railroads, 1945 plan in which millions of cars were produced by different manufactures up until the early 60's. The 40 foot box car is by far the most common rail car ever produced of any car made. Many still in service today but giving out to the larger newer box cars. We find our detail contours of the roof, ends and side panels to be the most accurate made of this model in any scale. Some of these cars are available in the Deluxe version with steel roofwalk. Note: these box cars are available in 2 to 4 number variations.