Antique Vtg Copper Enclosure Radio Antenna Aerial Ground Plane Short Wave Ham. Not 100% sure what this is, but it is clearly an antenna for something. Solid copper enclosure with copper coil antenna inside. Measures 5" x 5" x 6. This item is in the category "Consumer Electronics\Radio Communication\Antennas\Ham, Amateur Radio Antennas".
The seller is "relicsupply" and is located in this country: US.