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https://theassayoffice.com/help-with-hallmarks/compulsory-marks
To obtain a sponsor’s mark you must register with an assay office. The Standard Mark. This shows the fineness of the metal – ie purity of the precious metal content in parts per 1000 in relation to the standard recognised in the UK. For example 750 parts per 1000 by weight is equivalent to the old 18 carat gold standard.
https://theassayoffice.com/
Birmingham Assay Office was founded in 1773 to provide assaying (testing) and hallmarking of precious metal items (gold, silver, platinum and palladium) as required by the Hallmarking Act. It has been a centre of expert opinion and independent assessment of …
https://theassayoffice.com/hallmark-identification2
Town mark - This symbol will tell you where the item was tested and hallmarked.: The date letter - This symbol will tell you the year in which the item was tested and marked. The sponsor’s mark - This symbol will tell you who submitted the item to the Assay Office to be tested and marked. Standard mark - This symbol will tell you the type of metal from which the item is made; silver, gold or ...
https://theassayoffice.com/anatomy-of-a-hallmark
The Assay Office marks for gold would be in a Square shield with chamfered corners and in a blunt oval for silver. Import Marks from 1999. Following a ruling of the European Court of Justice the UK is required to accept national hallmarks of member states who provide an equivalent guarantee. In 1999 changes were made to the Hallmarking Act 1973 ...
https://www.drloriv.com/antique-tips/silver-jewelry-marks-and-more/
A leopard’s head mark on a piece of silver represents the Assay Office of London and a rose is the Assay Office mark or symbol for Sheffield. Silver jewelry and other items with a striding lion symbol or hallmark looking left indicates that the piece is 92.5 percent pure silver or sterling silver.
https://www.gemporia.com/en-us/gemology-hub/article/1056/what-is-hallmarking-on-jewelry/
Sep 13, 2018 · The word ‘assay’ itself is thought to come from the Old French word ‘essai’ meaning ‘trial’. Each assay office has a distinct mark, the aforementioned ‘town mark’, that makes up part of the hallmark itself. The one you’ll see on Gemporia pieces is the anchor, as our jewelry is hallmarked by the Birmingham Assay Office.4.8/5
https://www.langantiques.com/university/silver_assaying__hallmarking/
Assay Office marks As said, the first marks were born to prevent fraud and solely contained the mark of the maker. Being able to link an item to its manufacturer enabled duped customers to notify authorities whenever something was found to be wrong.
https://goodjewelleryguide.com/jewelry-hallmarks-guide/
Jan 21, 2021 · These requirements are to specify who made the jewelry, what the guarantee fineness standards are, the Assay Office where the jewelry was marked and tested, and the year the jewelry was tested. While a different policy was followed until 1998, after 1998, the date letter of these mandatory signs was made optional.
The Company of Goldsmiths of Dublin governs the Assay Office which is situated in Dublin Castle. The Company was established and incorporated by royal charter of Charles I on 22nd December 1637. The craft of goldsmith existed in Ireland long before this, during the prehistoric times as early as 1800 BC.
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