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The hallmark for sterling silver varies from nation to nation, often using distinctive historical 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.
Only London and Edinburgh assay offices now strike marks exclusively in the UK. As it now stands, the compulsory part of the UK hallmark consists of the sponsor or maker's mark, the assay office mark, and the standard of fineness (in this case silver, 925 parts in 1,000). Examples of British hallmarks for 925 silver
silver 1279–1662, 1836–1862 (and thereafter only for Maundy). Referred to as a "joey" after Joseph Hume, the economist and Member of Parliament until it stopped being issued in 1885. [4] Fourpence-halfpenny: 4½d: £0.0188: silver 1560 Countermarked Edward VI 2nd period shillings under Elizabeth I. Denoted by the portcullis coutermark on ...
Between 1997 and 2012 silver bullion coins have also been produced under the name "Britannias". The alloy used was Britannia silver (millesimal fineness 958). The silver coins were available in 1 troy ounce (31.1 g), 1 ⁄ 2 ounce, 1 ⁄ 4 ounce and 1 ⁄ 10 ounce sizes. Since 2013 the alloy used is silver at a (millesimal fineness 999).
The Leopard's head hallmark over time. Precious metals are rarely used in their pure form, as they are too soft. Gold, silver, platinum and palladium are generally mixed (alloyed) with copper or other metals to create an alloy that is more suitable to the requirements of the jeweller or silversmith.
Britannia silver is an alloy of silver containing 11 ozt 10 dwt (i.e. 11½ troy oz.) silver in the pound troy, equivalent to 23 ⁄ 24, or 95.833% by weight silver, the rest usually being copper. This standard was introduced in England by Act of Parliament in 1697 to replace sterling silver (92.5% silver) as the obligatory standard for items of ...
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The Birmingham Assay Office, one of the four assay offices in the United Kingdom, is located in the Jewellery Quarter, Birmingham.The development of a silver industry in 18th century Birmingham was hampered by the legal requirement that items of solid silver be assayed, and the nearest Assay Offices were in Chester and London. [1]