From these photos you won't get much help as the details aren't visible.
Ask for better photos, straight on front and back shots individually, not small group shots.
Looking for LDO marked EK2s and items relating to U-406.....
Here are better one!
From what I can see:
1-Arbeitsgemeinschaft der Hanauer Plaket-ten-hersteller, wideframe '24'
3-L. Chr. Lauer, '14'
4-J. E. Hammer & Sohne, '55'
5-Rudolf Souval, '98'
7-Rudolf Souval, '98'