The background has been removed so that they could be used in various EMD publications. These are period correct photos and not reproductions. I know that he received his photos from EMD's photo lab many many years ago as EMD was downsizing the LaGrange plant.
This product would be a great fit for those interested in classic American railroading and vintage train memorabilia, particularly for collectors focusing on the EMD Electro-Motive B&W era.