Grille colors for '49 5U D2

I have no doubts this has been discussed on here but my fingers can't seem to find the thread. I am in the process of rebuilding a 5U D2 and am planning on painting the grille this week, but all the old photos I can find have the grille all yellow, all black, black with yellow screen, or yellow with black vertical bars. most are in B&W so its hard to get a good view. Can someone point me in the right direction as to what it may have looked like out of the factory? It will have an armored guard over it so its not going to be seen directly, but I would like to do this as right as I can. Thanks for the help

Tony

[sub][/sub]Black bars with a yellow screen