It's a hinge strap, and I would say it's engraved by hand--not exquisitely, but pretty good craftsmanship. I could not say what era it's from nor what kind of object it's from. Probably part of a large box, desk, or something of that nature. I think it's old, but can't speculate on its actual age.
Its shape is ornate, as is the engraving, so I don't think it utilitarian like a door hinge. It is more decorative. Trunk, box, book case, fancy cabinet, etc. etc.