Photo Credit: Collection of Budd Laws
Railfan.net ABPR Image Archives Link - posted to alt.binaries.pictures.rail
...if the Railfan.net ABPR links doesn't show the photo try this
PRR no.5683, built August 1951, the last Lima-Hamilton unit built.
The PRR rated these as 2500 HP but Lima advertised these as 2400 HP.