References

Hallmarking information, change of use information and example images of hallamrks have been taken from the following websites:

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• The Goldsmiths' Company Assay Office

  • ​https://www.assayofficelondon.co.uk/hallmarking/what-is-a-hallmark

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• Birmingham Assay Office

  • ​https://theassayoffice.com/current-and-historic-assay-offices

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• The Royal Mint

  • ​https://www.royalmint.com/stories/collect/what-is-hallmarking/

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• Sheffield Assay Office

  • ​https://www.assayoffice.co.uk/our-services/authorisation-for-change-of-use