C&O Passenger Diesels
Here are a few more "might have been" C&O Passenger locomotives.

Many people have wondered what a C&O Alco PA would have looked like.

What if the C&O had bought Baldwin's 2000 HP Passenger Sharknose?

My personal favorite on this page, the Fairbanks Morse Eire Built.

What almost was: This is based on an actual C&O painting and lettering diagram for a simplified FP-7 paint scheme that was apparently never actually put into use.