A question that I have been unsuccessfully seeking an answer for a number of years might be more revalent now. Central Valley has recently released a model of a Northern Pacific 41' flat car. There is a photo of the model on CV's website. It is finished with a late lettering scheme. This is as per a photo that Jack Parker was kind enough to share with me some years back. I believe that earlier in its career this car was lettered with NORTHERN PACIFIC spelled out and with Andrews trucks. I would like to find a photographic evidence of this so that i can properly letter my car with the correct data placement.
Hopefully now that this car is on the market I can finally get an answer.