50 State Quarters to form what is known as a "mule". Only sixteen of these specimens, produced on dollar planchets, escaped from the mint. A 2005 Minnesota double die quarter, as well as a 2005 Minnesota quarter with extra trees (another die error), have both triggered numismatic interest. An unusual die break on some 2005 Kansas quarters created a humpback bison. Relatively more common are Kansas quarters bearing the motto "IN GOD WE RUST." The United States produces proof coinage in circulating base metal and, since 1992, in separately sold sets with the dimes, quarters, and half-dollars in silver. For the silver issues,
Quarters of nobility Quarters of nobility Quarters of nobility is an expression used in the bestowal of hereditary titles and refers to the number of generations in which noble status has been held by a family regardless of whether a title was actually in use by each person in the ancestral line in question. For example, a person having sixteen quarterings (formally in heraldry Seize Quartiers) might have exclusively noble ancestry for the four previous generations ("i.e.", to the great-great-grandparent level): Given two parents per generation, four generations of uninterrupted nobility = 2 = 16. Alternatively, such a person might have exclusively noble