TrashureSeeker- What part of Germany do you live in?? My people on my dad's side came from sw Germany (forgot the old state) about 200 years ago. They first went to south Russia to take up the generous offer the Tsar had at the time for good German farmers and then after about 2 generations split for the US when the Russians changed the rules. There's a lot of people of German ancestry in South and North Dakota. The Germans from Russia society has its center I think in Bismarck, ND.

What was the water body you were fishing the old 20 mm cannon casings out of?? A drainage ditch or a channelized stream? It looked pretty straight to be natural.