This was a puzzle hunt. It had been driven over by a tractor doing tree cutting. Got alot of iron targets and just started diggging. Found the main piece first then just kept digging anywhere from a few links to a strand. It's not complete,maybe I'll go back and locate the rest. At the top of the trojan man or whatever you call it, the patent says AUG 16 1879. Needed a loop to see it. Copper core and possible gold or brass gilt.