Dating british gold hallmarks
Conversely, convention hallmarks that have been applied in other member countries are recognised in the UK.
Some of The Assay Office marks of member countries of the Convention are illustrated below.
For example 750 parts per 1000 by weight is equivalent to the old 18 carat gold standard.
The alloy must be at least 750 parts per 1000 to be marked as such. This symbol shows which Assay Office tested and marked the item.
This is the unique mark of the company or person responsible for sending the article for hallmarking.
The sponsor may be the manufacturer, importer, wholesaler, retailer or an individual.
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.
The Anchor is the symbol of Assay Office Birmingham .
Shows the year in which the article was hallmarked.
It should be noted that the head did not always change with the Monarch! The figure of Britannia was used from December 1784 to July 1785 to indicate repayment.
These are traditional standard marks that can still be used today. Since 1972 the UK has been a signatory to the international convention on hallmarks.
This means that UK Assay Offices can apply the common control mark which will then be recognised by all member countries in the convention.