What is this? Whats the age on it? Found this item metal detecting in a site of an army air field. practice training base. And base. Is it related to the place? Army related? It does not stick to the magnet. guessing brass or copper? Found in area where 1951 wheatie was found.
I was leaning towards a rivet, stud, wall anchor of some sort, but the notch in it threw me off. Can't tell if it's a purpose cut notch or an accidental notch (IE damage).
All the babble said, it doesn't look like any shell casing I've ever seen.