EdHartzel Sr. Member Jun 12, 2018 264 782 Bucks County PA Detector(s) used Minelab Equinox 600, Garrett GTI 2500, JW Fisher Pulse 8X Primary Interest: Metal Detecting Apr 30, 2019 #1 Working a cornfield today that has turned up knee buckles and flat buttons in the past and recovered this guy. It’s copper. Its hollow. And I have no idea. Anyone have a guess?