This is most likely PRR train #1077, the "Nellie Bly" which ran from New York to Atlantic City in 2 hrs and 45 min and would have received an engine change here from a GG1 to the K4s. For sure, the train is on the track headed down the Bordentown Branch to Camden (and possibly beyond to AC). K4s #5409 was a 1927 product of Baldwin Locomotive Works. The new pilot and relocated headlight are part of post war modernization that CKF said made it an example of "What a good looking locomotive should not look like."
What did passenger trains look like before Amtrak in America, and Via Rail in Canada? Find out in this album with 2,700+ Historical Photos from early passenger trains of North America from the 1900's up until the early years of Government passenger trains