Reading: Proof coinage – Wikipedia
The dies for making mod proof coins are much treated with chemicals to make certain parts of the design take on a frosted appearance, with the polished fields taking on a mirror eat up. several other methods have been used in the past to achieve this effect, including sand blasting the dies, and flatness proof. Proof coins of the early nineteenth century evening appear to be scratched, but it was contribution of the production procedure. The term “ proofread ” refers to the process by which the coins are made and not to the stipulate of the mint. authentication agencies can grade and assign numerical ratings for proof coins. A PR70 mint is the highest class possible for a proof coin and indicates a arrant exercise, with PR69 and lower grades reflecting some lack in the strike, centering, details, or other aspect of the coin. Most proof coins are duplicate strike under higher press. This does not normally result in doubling that is readily discernible, but does result in the devices being struck fully, resulting in intricate elements of the original die being present on the proof that may not be portray in such detail on circulation strikes. After being struck, they are individually and individually handled, in line to convention coins which are thrown into bins .
United States proof coins [edit ]
The U.S. had largely stopped striking proofread coins in 1916, although a few later specimens exist. From 1936 to 1942, proof coins could be ordered individually from the United States Mint. Beginning in 1950, customers could order proof coins alone as arrant sets .
From 1950 to 1955, proof sets were packaged in a box and each of the five coins was sealed in a cellophane udder. 1955 saw both the original “ box ” packaging and introduced the flat-pack, where the coins were sealed in cellophane and presented in an envelope. The flat-pack box continued through 1964, after which the coins were sealed in assorted styles of hard plasticize cases. ( From 1965 to 1967 the production of validation sets was suspended and special Mint Sets were made in their stead. They were made at the San Francisco Assay Office but bore no “ S ” mintmark. ) Sets struck from 1936 to 1942 ( 1942 offered a five-coin and a six-coin interpretation, the latter included the silver wartime nickel ) and from 1950 to 1972 include the cent, nickel, dime bag, quarter, and half dollar. From 1973 through 1981 the dollar was besides included, and besides from 2000 on. The 1999–2008 proof sets besides contain five unlike 50 State quarters. The 2004–2005 series besides contain the two Lewis and Clark nickels. The 2007-2016 proof sets besides include presidential dollars. The 2010-2021 proof sets besides contain America the Beautiful quarters, depicting different National Parks and Monuments. Proof sets issued in 2009 contain 18 coins – the most ever included – as that year featured four different reverses for the Lincoln Cent, six quarters issued under the District of Columbia and United States Territories quarters program, four Presidential and one native american dollar struck that year, and the five penny, dime bag, and half dollar coins. Proof sets containing lone 2009 cents, 50 State quarters, America the Beautiful quarters, Presidential dollars, and american Innovation dollars are besides available. The U.S. Mint has besides released limited proof sets, such as in 1976, when a proof set up of three 40 % silver-clad coins : the one-fourth, half-dollar and dollar coins depicting limited reverses to commemorate the U.S. Bicentennial was issued. From 1971 to 1974, proof silver-clad Eisenhower dollars were issued in a formative case contained in a brown wood-grain ending slipcase box, and are referred to as “ Brown Ikes ”. Proof Susan B. Anthony dollars were struck in 1999. Although these proof dollars were sold individually and not included in the proof sets for that year, some third base parties used the cases from other years to create 1999 proof sets that include the dollar, prompting the U.S. Mint to advise the public that these sets were not government-issued sets. A proof “ Coin & Chronicles ” laid was issued for 2009, which included one each of the 4 different Lincoln Cent designs and a commemorative Lincoln Silver Dollar, presented in special packaging. other sets, called “ Prestige Proof ” sets, besides contain selected commemorative coins. These sets were sold from 1983 to 1997 ( except 1985 ) at an extra premium. As Legacy Proof sets, the practice was resumed from 2005 to 2008.
occasionally, there are errors which escape the Mint ‘s inspection march, resulting in some very rare and expensive proof sets. This has happened at least seven times : 1968-S, 1970-S and 1975-S and in the 1983-S Prestige set, each with a dime bag that has no batch target ; a little number of 1971-S sets included a nickel without a mint crisscross ; 1990-S saw both regular and Prestige sets which included a penny with no mint mark. not as rare ( or as expensive ) are proof sets issued with coin varieties that are less park than those found in early sets issued in the same year. These include the 1960 and 1970-S sets, both of which are found in either a “ little date ” or “ big date ” variety, which refers to the size and placement of the date on the Lincoln cent. The 1979-S and 1981-S sets each come in either a “ type I ” or a “ Type II ” translation, where on all coins the “ S ” mint stigmatize is either “ filled ” ( besides known as the “ blob ” mint distinguish ) or “ clear ”. 1964 has a design variation where the President ‘s portrayal on the Kennedy half-dollar has “ accented hair ”. The blueprint was modified early in the production ( reputedly at the request of Jacqueline Kennedy ) to give the hair a smoother appearance. This resulted in the “ tonic hair’s-breadth ” assortment being somewhat rare and commanding a premium over the “ regular ” variety. Since 1992 the batch has struck proof sets in both silver and basis metallic. besides, “ Silver Premier ” sets, featuring deluxe packaging, were offered from 1992 to 1998. U.S. commemorative and bullion platinum, palladium, amber, and silver medal coins are besides often issued in both uncirculated and proof types, sometimes with different mint marks. Starting in 1947 the U.S. mint began producing “ mint sets ”, and because of the terms used there is some confusion over the dispute between these and validation sets. These are uncirculated coins that have been particularly packaged, and are by and large neither as expensive nor vitamin a valuable as proof. There are some exceptions, however. Those produced from 1947 to 1958 ( none were made in 1950 ) were double sets packaged in cardboard holders and have dear collector requirement. Because mint sets contain specimens from each mint the valued metal value of the coins in a mint set could exceed the value of a proof arrange for common dates. Another exception is the 1996 mint set, which, in addition to specimens from the Philadelphia and Denver mints, contained a Roosevelt dime bag from the West Point mint ( commemorating the fiftieth anniversary of the Roosevelt dime bag ) and which was available alone in this mint set. From 1965 to 1967 the mint did not sell proof or uncirculated coins, but only a loanblend merchandise, “ special mint sets ”, none of which are peculiarly valuable. From 2005 through 2010 the U.S. Mint used a particular “ satin stopping point ” on the coins in its uncirculated sets, but in 2011 changed to a “ brilliant finish ” so that contact marks incurred during the normal output process would be less noticeable. The Philadelphia and Denver mints besides sold annual “ keepsake sets ” from their give shops since 1973 ( 1972 for Denver ). These are not mint sets and by and large not of senior high school collectible value, although the 1982 and 1983 sets are in demand, since no “ official ” batch sets were issued during those years. Sales of the keepsake sets ended in 1998 with the launching of the 50 State quarters. finally, person dealers have made unofficial “ class sets ”, privately packaging all denominations of a certain date. The latter have no value beyond their individual coins. Members of the public should be careful to understand what products they are being offered, and that, until supplies are exhausted, stream and previous batch and proof sets are available directly from the mint.
See besides [edit ]
References [edit ]
Sources [edit ]
- Dannreuther, John W. (2004). Official Guide to Coin Grading and Counterfeit Detection (2nd ed.). New York: House of Collectibles. p. 432. ISBN 0-375-72050-2.