This boxy switcher was built by Fairbanks Morse in June of 1948 as PRR H1-=44 #5986 (serial #10L69, class FS-10). The specs according to the info on the back of the photo are - 40" drivers, prime mover FM 38D-8 1/8, 1,000hp unit, engine wt of 242,000 lb and tractive force of 40,400 lb. Unfortunately, no photographer was listed for the photo.