A silver object that is to be sold commercially is, in most countries, stamped with one or more silver hallmarks indicating the purity of the silver, the mark of the manufacturer or silversmith, and other (optional) markings to indicate date of manufacture and additional information about the piece. In some countries, the testing of silver objects and marking of purity is controlled by a national assayer's office.
Hallmarks are applied with a hammer and punch, a process that leaves sharp edges and spurs of metal. Therefore, hallmarking is generally done before the piece goes for its final polishing.
The hallmark for sterling silver varies from nation to nation, often using distinctive historic symbols, although Dutch and UK Assay offices no longer strike their traditional hallmarks exclusively in their own territories and undertake assay in other countries using marks that are the same as those used domestically.
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United Kingdom and Ireland
One of the most highly structured hallmarking systems in the world is that of the United Kingdom, (Scotland, England, Wales and Northern Ireland), and Ireland. These five nations have, historically, provided a wealth of information about a piece through their series of applied punches. It should be noted that since 2015 visually identical UK Hallmarks are being struck in India and Italy by sub-offices of Birmingham & Sheffield Assay Offices respectively:
- A stamp indicating the purity of the silver is called the assayer's mark. The mark for silver meeting the sterling standard of purity is the Lion Passant, but there have been other variations over the years, most notably the mark indicating Britannia purity. The Britannia standard was obligatory in Britain between 1697 and 1720 to try to help prevent British sterling silver coins from being melted to make silver plate. It became an optional standard thereafter, and in the United Kingdom and Ireland is now denoted by the millesimal fineness hallmark "958", with the symbol of Britannia being applied optionally. The purity mark for Irish silver is the harp crowned.
- The date mark is a letter indicating the exact year in which the piece was made. The typeface, whether the letter is uppercase or lowercase, and even the shape inside which the letter is stamped, must all be taken together to determine the year.
- The city mark no longer indicates the city in which the piece was assayed, or that the item was assayed in the UK. A Legislative Reform Order (LRO) came into law on 8 February 2013 giving UK Assay Offices the legal right to strike hallmarks outside of UK territory. Since July 2016 Birmingham Assay Office have been striking identical Birmingham Hallmarks in Mumbai, India and there are proposals for further offshore marking centres using traditional UK marks in Jaipur, New York and China. Sheffield Assay have a sub-office in Malpensa, Italy. London and Edinburgh Assay Offices are the only two Assay offices exclusively striking hallmarks in the UK.
- Each silver maker has his or her own, unique maker's mark. This hallmark is usually a set of initials inside an escutcheon. The Legislative Reform Order (LRO) which came into law on 8 February 2013 also changed the requirements for sponsor marks, allowing logos to be used for the first time, as long as they provide the required traceability.
- Irish silver also contains the image of Hibernia. This mark was introduced in 1730, and is still in use today.
The series of hallmarks described above are still in use in today.
However, there are two silver hallmarks that have been discontinued:
- Beginning on 1 December 1784, British law mandated that a duty mark be applied to silver pieces. This showed that the requisite tax had been paid to the Crown. The duty mark was a profile of the head of the current reigning monarch. The mark was discontinued in 1890.
- An additional British hallmark that is no longer used is the tally mark, which was the unique mark of a journeyman finishing his apprenticeship. These marks were used as a record of the pieces made by each journeyman so that each could be given proper payment.
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France
The French assay mark for sterling silver is the head of the goddess Minerva. In fact, the French standard for sterling silver is higher than that of other nations, requiring a silver content of 950 parts per thousand, or 95% silver. Silver items with a slightly lower grade of silver, 800 parts per thousand, are marked with the head of Minerva, next to which is a "2".
French silver made for export carries an assay mark in the shape of the head of Mercury, along with a number to indicate the millesimal fineness: "1" for .920, "2" for .840 and "3" for .750.
French silver also is punched with the mark of the maker.
United States
In the early United States, no national assaying system was adopted, although the city of Baltimore did maintain its own assay office between 1814 and 1830. Prior to the general adoption of sterling silver as the standard of purity in 1868, silver was generally obtained from the melting of coins. Since these could vary considerably in purity, from around .750 millesimal fineness to around .900, silver known as "coin silver" varies in purity. Silver at that time was sometimes marked "COIN" or "PURE COIN", but can also be without a standard mark altogether. After the adoption of the sterling standard, pieces were marked with "STERLING", the number "925" or the notation "925/1000".
The United States also had no date marking system. Because of this, some companies within the U.S., such as Tiffany and Gorham, adopted their own date marking systems.
While American manufacturers did not apply assay marks, city marks or date marks, they did apply a maker's mark. This is generally not done today. The old hallmarks were as unique as today's logos, and disputes often arose when one company copied another's stamp.
"In the USA, The National Gold and Silver Marketing Act does not require precious metals to be marked with quality. However, if a quality mark is used, the mark must be accompanied by a manufacturer's hallmark that is a registered trademark or the name of the manufacturer. If there is ever a question about the content of a piece of jewelry, the manufacturer can be traced using the hallmark stamped on the piece....US law requires a maker's mark in the form of a hallmark or registered trademark in addition to the quality mark if the goods are quality marked. The name of the artist or manufacturer may now be used for this."
Hungary
Between 1867 and 1933, Austria-Hungary and later, Hungary used the crescent moon crowned head of antique Greek heroine Diana as the hallmarking symbol of legal silver alloys. The head was encircled by a frame, optionally composed of convex, concave and straight lines. One concave line represented 140/1000 fineness, a straight one 150 and a convex one 160. For example, a Diana head within a frame made in the shape of a 5-petal flower represented 5x160 = 800 thousands fineness, a local silver standard commonly used in eating forks and spoons. Meanwhile, a hexagonal frame represented 900 fine silver. The same logic was also used to frame gold hallmarks.
Source of the article : Wikipedia
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