rosetta stone
it is the car company volvo :-)
Fiat
Mini
Volvo
Most circle earrings are completely sterling silver or sterling silver plated with gold. But some are a base metal, which depends on company, and then plated with gold. Most generally the plated base metal earrings are costume and not very valuable.
Silver Circle - 2013 is rated/received certificates of: USA:PG-13
Opel
Opel
Tuttle Silver Company was created in 1890.
Stieff Silver Company Factory was created in 1925.
Take a slightly damp cloth, and gently rub the silver side of the disc, if that doesn't help bring it in to the company manufacturer, or bring it to gamestop.
It is a company that makes silver-plate objects. Started by a guy named Poole.