Earrings are cut and sanded, from the 2 Vintage Tin in the images. The Orange Flower is riveted to the larger circle with a brass rivet. The 3 dangling circles are cut from the same green tin as the larger circle
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.