From Trainorders via Railway Preservation News:
http://www.rypn.org/forums/viewtopic.php?f=1&t=35025
http://www.trainorders.com/discussion/read.php?2,3076295
Reference to PRR GG-1 4876 is to that unit being the one that ran away and crashed into Washington Union Station just before the inauguration of Dwight Eisenhower in early 1953. The unit survives, and some have suggested it be restored and displayed at Union Station, but some others think that such a reminder of an embarrassing wreck isn't advised. . .