I have a shoebox under my desk of small fragments from a KG2 Do17Z that crashed at Whitstable in 1940. Most are unrecognisable smush, but better ones include a piece of compass rim and – unusually – a number of 20mm cannon cases. IIRC at least one was fired, rather than “cooked off” in the post-crash inferno. Saddest relics are a Reichspfennig and a cigarette lighter…

I also have a paperweight from the same site – though the edges of a bit of shrapnel do tend to make a mess of delicate paperwork!

Adrian