I'll move this one to where the SS collectors might be able to shed light upon it.
Looking for LDO marked EK2s and items relating to U-406.....
Sportsfest der 24 SS Standarte 10/6/1934. (Sportfestival of the 24th SS Regiment 10th June 1934).
I have never seen this one before. Anything SS related always has to be treated with the greatest caution. Possibly original, but that is only my gut feeling and it needs to be researched more.