Interessting 13 mm German airplane rounds, found in the woods near Rijen.
Found many more as I can show on pictures, the live ammo was reported but I also found many empty cartridges, some of them I have cleaned. You can see the result. Interessting headstamps.

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Eine Lichtung im Walde wo die Sonne scheint.
Eingeschlossen durch Bäume sind wir gefangen,
in dieser Lichtung Gottes...