Looking at the window frame paint color, does this indicate the prototype was possibly made of brass? Boxcab E50
Actually that is just the frame color that B&O chose. I have been in a couple I-12's and that is the color of the sashes and frames. It is the same color as the interior of steam loco cabs as far as I can tell.
OK. It caught my eye. Guess I'm used to seeing aluminum or stainless steel used. And thus the associated silvery color. Boxcab E50