Somewhere in my basement is a 78 rpm recording of the Broadway Limited leaving Englewood. The station announcer states the train is going to Fort Wayne, Crestline, Pittsburgh, Altoona, Harrisburg, Philadelphia, Newark, and New York. It is pulled by a K4s as you can tell by the distinctive chugging sound and the whistle. The recording was made from the cab of the locomotive.
The last K4s I saw close up was in 1952 leaving Baltimore going up the Northern Central. I was standing next to it as it departed. The very last ones I saw were in 1957 at the Newark engine terminal from passenger trains heading into / out of New York.