I've never seen any photos of the C&O T1 that was tested on PRR. Its number was 3018 and the test was run in Feb 1942. However, there are at least two of the N&W Class A (#1208) on PRR that exist. One is at the Railroad Museum of PA in Strasburg. It's a framed print hanging on the second floor of the main building (entrance) near the elevator. I don't know that it's ever been printed in a book. There's another photo of 1208 going thru Tyrone on Oct 8, 1941 that's been published in Eric Hirsimaki's book, Black Gold Black Diamonds Vol. 1, pg 114.