Det lär ha varit Generaldirektören Erik Upmark som slutligen påtog sig att beställa koppelstångslok. Måhända var han påverkad av liknande skrivelser som dessa här nedan.

[img]https://hosting.photobucket.com/albums/c63/bengts/ellok/Mag/Dok/.highres/M19520225-1.jpg?width=1920&height=1080&fit=bounds[/img]

[img]https://hosting.photobucket.com/albums/c63/bengts/ellok/Mag/Dok/.highres/M19520225-2.jpg?width=1920&height=1080&fit=bounds[/img]

[img]https://hosting.photobucket.com/albums/c63/bengts/ellok/Mag/Dok/.highres/M19520228-1.jpg?width=1920&height=1080&fit=bounds[/img]

[img]https://hosting.photobucket.com/albums/c63/bengts/ellok/Mag/Dok/.highres/M19520228-2.jpg?width=1920&height=1080&fit=bounds[/img]

[img]https://hosting.photobucket.com/albums/c63/bengts/ellok/Mag/Dok/.highres/M19520228-3.jpg?width=1920&height=1080&fit=bounds[/img]