GP38AC 643 by Frisco.org Posted on May 2, 2017 GP38AC 643 GP38AC 643 at Hamlet, North Carolina in December 1974 (R.J. Robl). Also pictured are Seaboard Coast Line GP40 1574 and GP40-2 1650. Posted in Slides | Tagged 643, Electro-Motive Division, GP38AC | Leave a comment