The photo of AT 10338 clearly shows a shop date of 11-46 (Topeka).  Conjecturing, this one could have been moved to freight service, repainted and had the steam and signal lines removed.  The other three photos show cars as new, the picture filename says 1941.  Conjecturing again, they could have had the steam and signal lines installed at Topeka after receipt.  Tom Birkett's observations match with this conjecture.

My Santa Fe freight car books have moved, but I have not, so I have no other data points to contribute.

Ron Merrick