The King’s Assay Master
The King’s Assay Master is a role that has existed for hundreds of years. Serving the reigning monarch, the appointee ensures the integrity of Britain’s coinage, which is deeply rooted in heritage and tradition. As we transform and evolve as an organisation, we endeavour to preserve our traditions, authenticity and British craftsmanship.
What Does the Role Entail?
Traditionally, the term ‘Assay Master’ refers to an officer appointed to test the weight and fineness of precious metals. In today’s role, the King’s Assay Master tests the metallic components within the coinage by using modern assay techniques that are underpinned by traditional craftsmanship. Once that process is complete, the coins are independently verified at one of the oldest quality assurance processes in existence today. The Trial of the Pyx comprises a jury whose purpose is to determine the accuracy and quality of the coins. This verification process establishes whether the coins meet legal standards of weight, diameter and composition.
The prestigious and centuries-old position of the King’s Assay Master is currently held by our head of lifestyle operations, Daniel Thomas.
The Trial of the Pyx
The Goldsmiths’ Company of the City of London, who provides an independent jury, carries out the Trial of the Pyx. The jury includes the Chancellor of the Exchequer (or a nominated representative), financial leaders, representatives of The Royal Mint, and freemen of The Goldsmiths’ Company. The King’s Remembrancer and a senior judge, who officiates at the trial in agreement with HM Treasury, swear in the trial.
