Number Boards

NW Mailing List nw-mailing-list at
Tue Jan 21 21:41:38 EST 2014

Hello there, I've been going through my N&W picture books and I've noticed that some diesels sported black on white number boards and some had white on black.  Was there any real reason as to why some would have different boards?  Any knowledge on this would be appreciated.

-Evan Miller
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