Carrying this C&O discussion further --
When did C&O begin to paint box cars with black paint?
I've seen photos of black cars with yellow lettering, and black cars
with white lettering.
Were the two lettering colors used at the same time on different cars,
or did some black cars get one color lettering, and then they switched
to another lettering color on black?
Were all repainted box cars painted black for a period of time, or did
only certain cars get black paint?
Were any new cars delivered in black paint? With what color letters?