I came across a 40mm Bofors Mk. 4 round at a family residence and I’d like to know exactly what type of round it is. I’m not sure of it’s place of manufacture, but I’m guessing it is an Australian round. The Primer and Propellant have both been removed, so the cartridge is empty; however, the round is still in place. It is black, with a yellow stripe and several markings, e.g. [H.E.S], etc.
Attached are a few photos of the round.
I came across one website that suggested it may be a practice round, but I was under the impression that different countries have slightly different colour codes. Also I was under the impression that yellow represents High Explosive.
Is it safe to hang on to this, or should I be handing it in?