This appears to be a postwar railway police (Bahnpolizei) shoulder board. Postwar Bundesgrenzschutz shoulderboards were similar except with green backing instead of blue. I hope this helps.
"You can't please everyone, so you've got to please yourself." Ricky Nelson
The shoulder board with intertwined "Russian Braid" is West German for the Bahnpolizei. The second shoulder boards that you show are East German for the Transportpolizei (TRAPO).
"You can't please everyone, so you've got to please yourself." Ricky Nelson