I'm scanning some more photos, and the train order in this one caught my eye. The photo is an official CB&Q photo identified on the back as Last run C&S ng, and dated 8-25-43. I zoomed into the train order and compared it to a flimsy that I have in my collection, and it looks like the same train order. I'm pretty sure it's an original. It's on very flimsy paper, with the carbon on the back so you're reading it through the paper. I found it between the pages of a book that I bought used - I think it was either Poor's DSP&P book or the Pictorial Suppliment.
Full photo:

Close-up of the train order and the flimsy in my collection:


Markings on back: