Jim Wirth of OpenRoad.TV has been a passionate metal detectorist ever since he was a kid. Jim wrote to me:
I hang out on a website called Treasurenet.com, which has forums all related to metal detecting. One of the forums (which I've used myself a number of times) is the "What is it?" forum, where people can post a picture and description of something they've found metal detecting yet have no idea what it is or what it was used for. There is a thread on this forum that I thought would interest you and your readers. Who knows, maybe you or one of your readers might know what this item is...Metal detectorist's mysterious find
David Pescovitz is Boing Boing's co-editor/managing partner. He's also a research director at Institute for the Future. On Instagram, he's @pesco.