Actually not worth much in terms of money, but a cool find

Hi guys,

last weekend we went magnet fishing at a small water gate, not expecting much, but then found around 20 to 25 kilos of fired 20x139mm anti aircraft shells.
These aren't worth much as they are made of steel, but it's a very cool find over here in Germany where these things are very hard to come by. Police even said we could keep them