Pennsylvania Railroad GG1

Trains.  December 1981.  Vol 42, No. 2

The New Wonder Book Cyclopedia of World Knowledge.  Volume X.  International Press, 1954.

According to Pennsylvania Railroad GG1, 139 were built between 1934 and 1943 and some remained in operation into the 1980's.   Only 16 survive today.

See Mister G's previous posts:  GG-1 #4800, Amtrak #926 and GG-1's in freight service.