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The fineness mark, the crowned harp, was applied to 22 carat gold and sterling silver, which was silver of a standard of 925 parts of fine silver in each 1,000. In 1638 a date letter system was introduced and used in conjunction with the above marks.
In 1427, the date letter system was established in France, allowing the accurate dating of any hallmarked piece. In 1478, the Assay Office was established in Goldsmiths' Hall. At this time, the date letter system was introduced in England. This was originally intended to be the mark of an official known as the Assay Master, who was sworn in ...
The Dutch (the Netherlands), who are members of the International Hallmarking Convention, have been striking hallmarks since at least 1814, and boast a 600-year history of hallmarking in Dutch territories. Like many other nations, the Dutch require the registration and use of Responsibility Marks since 1797. The Dutch also use a date letter code.
The hallmark indicates the amount of precious metal in the alloy in parts per thousand (the millesimal fineness). In addition to indicating the town where the item was marked, a unique sponsor's or maker's mark identifies the item's origin and a date letter to represent the year of marking. Traditional hallmarks
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All About Antique Silver with International Hallmarks. AAA Publishing. ISBN 978-0-9785168-0-2. "Hallmarking Act". Archived from the original on 5 February 2007 "Hallmarking Law". British Hallmarking Council. Archived from the original on 6 April 2010
Following a two-year hiatus, Hallmark Mystery is bringing the characters back to life starting with 2024’s Signed, Sealed, Delivered: A Tale of Three Letters (which is a working title).
The anchor mark no longer indicates that an item was assayed in Birmingham. In July 2016 Birmingham Assay Office began striking its hallmark via a subsidiary in Mumbai, India. In 2018 the British Hallmarking Council announced that hallmarks struck overseas must be different from domestic hallmarks. Beginning in early 2019 a modified version of ...