The GG1 (often written with a dash, GG-1) is probably the most famous electric locomotive ever made. The Pennsylvania Railroad built them at the Altoona shopsin collaboration with Baldwin, Westinghouse, and General Electric. 139 units were built between 1934 and 1943, and the last was retired in 1983. They served on PRR, PC, Conrail, Amtrak, and New Jersey Transit. 16 survive, all non-operational. The GG1's basic shape is difficult to describe. It's known far and wide; however, two other classes of PRR electric had similar styling. The GG1 can be identified by its 2-C-C-2 wheel arrangement. The first GG1 had a riveted body. It is also notable for being the Bicentennial GG1, and the only one to receive Conrail blue instead of just a patch job. http://www.spikesys.com/Bin/GG1/4800.jpg http://crcyc.railfan.net/locos/elec/gg1/cr4800bicen1.jpg http://crcyc.railfan.net/locos/elec/gg1/cr4800cr.jpg http://crcyc.railfan.net/locos/elec/gg1/xprr4844cf.jpg http://www.rr-fallenflags.org/prr/prr4877drc.jpg The rest of the GG1s looked like this as built: http://www.spikesys.com/Bin/GG1/4877.jpg http://crcyc.railfan.net/locos/elec/gg1/xpc4802cr.jpg http://crcyc.railfan.net/locos/elec/gg1/pc4860cf.jpg http://www.rrpicturearchives.net/showPicture.aspx?id=115409 http://www.rrpicturearchives.net/showPicture.aspx?id=373706 http://www.davesrailpix.com/prr/htm/prr025.htm Many GG1s were modified with large, high intakes: http://www.spikesys.com/Bin/GG1/4890.jpg http://en.wikipedia.org/wiki/Image:Amtrak_No_928.jpg http://www.davesrailpix.com/prr/htm/prr105.htm http://www.spikesys.com/Bin/GG1/4903.jpg http://railpictures.net/viewphoto.php?id=156662 http://railpictures.net/viewphoto.php?id=137174 http://www.rrpicturearchives.net/showPicture.aspx?id=357252 A list of (hopefully) all GG1 paint schemes ever used, including patch jobs: http://www.spikesys.com/GG1/paint.html http://www.rrpicturearchives.net/showPicture.aspx?id=118206 A normal GG1 leads "Old Rivets". http://www.rrpicturearchives.net/showPicture.aspx?id=63400 Similar situation. http://railpictures.net/viewphoto.php?id=158084 Modified intake GG1 leads a normal GG1. http://railpictures.net/viewphoto.php?id=156660 An engine terminal full of GG1s.