Very nice late war zinc Deumer, the variant with non-cutout swastika and gun, and the "question-mark"-shaped round-wire catch.
That's the best conditioned zinc U-boots Kriegsabzeichen I've ever seen. Stunning piece.
Looking for LDO marked EK2s and items relating to U-406.....
" When you're chewing on life's gristle, don't grumble, give a whistle "