This is what will most likely be the final look The Cresent Moon and Stars was an actual Trademarked Railroad Logo 1882 (see below) The Proctor and Gamble Manufacturing Group from Port Ivory Staten Island NY
As Kurt Moose suggested, I would ask that you consider some safety stripes on both ends. Yellow or gold would look very nice. And would give a little more life than plain white. Just a couple would do.
James, I like your loco graphics layout! Since I am modeling 1890s-1930s, I was thinking of doing a P&G tank car. I have a number of prototype photos. I also read about their facilities on Staten Island. Scott