Coins have been used as a form of currency across the world for almost three thousand years. Much like today, the earliest coins were formed from metals, with more precious metals reflecting higher monetary value. The most common shape of coin is a flat, rounded disc shape, which also tends to be small in size. Antique and rare coins can hold high value on the collectors' market, and some coins produced by Germany can be of particular interest to numismatists. Until the late 19th century, Germany was made up of a number of states which produced their own various currencies; as a result, the unification of Germany brought a uniform currency to the nation. Up to and during the Second World War, the Reichsmark was the official currency of Germany, including coins which bore Nazi insignia.
As one of the leading auctions houses in the US, Rago Art has an annual sale of about $ 30 000 000. Their experts are frequently appearing as appraisers in the Antique Roadshow and have validated objects such as Andy Warhol "Jackie II" Artist’s Proof, 1966, valued at $20 000 in 2011 and Picasso's Madoura Urn, ca. 1960 for the value of $12 000 - $15 000.