Earrings are cut and sanded, for smoothness, from the Vintage, British, embossed tin in the images.  A small brass circle hangs from the earrings with a small piece of the tin glued inside of it, with jewelers glue.
Earring wires are antique gold-plated brass, 16mm flat fishhook with open loop, 21 gauge.  Each pair come with silicone clear earring backs. 
Earrings have been treated with a museum grade wax to protect and enhance, called Renaissance.
Some of the tins are vintage and have been lovingly used over decades. Therefore, there may be fine scratches or imperfections.