Unknown shoulder boards Help me identify

[PanzerFrank]

Hi guys. Shoulder boards aren't in my scope of collecting. I got these boards along with a large number of German ww2 and ww1 boards. These are the only 2 pair I cannot identify. The Black/Silver pair (A), remind me of Railway Police, but I could not find an exact match. The other pair (B), I have no clue. Merry Christmas to all! My gift would be to I.D. these boards. Regards, Frank

[Stive]

Set 1. Shoulder strap of zugfuhrer of police of protection of the TN plants

[Stive]

Set 2. Unknown

[Stive]

Option 2 (set A) - Bahnshutz shoulder straps