For all the nyc railroad buffs I want to say thank you for your responses regarding the question of the 2 tone color scheme on the F3 passenger diesels. As a result of your assistance it is now apparent that at least 2 of these F3 were painted with a 2 tone gray that was the same standard used on most of the NYC passenger locomotives . If anyone has any additional information about this livery - photos ,fact sheets , first hand accounts etc. please pass it on Thanks so much
Gary