Found this at a local park after getting a quirky reading on my Equinox. When I first dug it, I thought "Just another pull tab" until I pulled up the chain along with it.
Really, I did find it this way. My hunting buddy can attest to it. Why? It's beyond me......
Youth culture has been upcycling them into pendants, bracelet charms and earrings for some time. Jewellery companies have cashed in on the trend too with reproductions in silver and other metals. This one available in silver plate for $25 including the chain:
I was going to suggest that another detectorist put that pulltab on the necklace and re-buried it as a joke for another hobbyist to find. It is unique though.