The EMD GP35 was a four axle freight locomotive. 1333 of them were built between 1961 and 1963. If you want details on the specifications, go here: EMD GP35 Datasheet. Many railroads bought them and many are still in use. The L&N bought them and I think I remember seeing them. Could have been GP38 or something similar. The Chessie system also bought them so we get to see Chessie again.
The model I have is a partially assembled Athearn.