hinge

Found this strangely shaped item in a harvested bean field in west central Indiana near an old home site dating to around 1830s. It registered about a 55-60 on my Garrett AT max and based on the look of it I'd say it's copper alloy (brass usually rings up around 77) but I'm not sure why it's not...

Found this at a site in west central Indiana, USA that turns up items that date to early 1800s-early 1900s. Any ideas? I included a front and back image and also an image of a tiny hinge on the back and a tiny loop (makes me think something would’ve clipped into this loop when it closed using...