Could you post a photo for of the backside , is it black underlay .
But my guess would be Bahnschutzpolizei (Railways Protections Police) do to the colour and the police style .
If you don't get any other responses retitle the thread Bahnschutzpolizei shoulder boards , maybe Mr Saris will see it and give you a definitive answer . Good luck .
Thanks Ralph , hope this helps .