Here is another Weaver 40' boxcar I bought thinking is was based on a real car. K-line did a similar 40' boxcar.
After searching for this car a couple of times, I have accepted the fact it did not exist. I did find a similar Reading "Share in Freedom" with eagle scheme on a 50' boxcar, but those cars were more brown than the very green on the Weaver car. I also learned that the eagle was put on only four of the 50' "Share in Freedom" boxcars, numbers 19805-19808, so the number on the Weaver car is correct. As far as I can find, the eagle on these four boxcars would give them the only real* Bicentennial paint scheme of the Reading.
*There are cabooses in this paint scheme, but could not find a photo of a prototype for those either.