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British Hallmarking Council Issues Guidance on Hallmarking of Partially Constructed Items

Published: 29th October 2021

The British Hallmarking Council has recently published new guidance pertaining to the hallmarking of partially constructed items.

Assay Offices can apply hallmarks to partially constructed items, providing certain conditions are met. These conditions are designed to ensure that the finished article complies with the Hallmarking Act.

The BHC’s guidance sets out the conditions:

  • The article must be sufficiently advanced in workmanship
  • If composed of one or more parts, all parts must be present: the guidance gives some examples of required components
  • The article must comply with Hallmarking Act conditions, eg as to fineness, to permit it to be hallmarked
  • If an article is submitted disassembled, it must be assembled using only the metal parts that were submitted with it.

In addition, the guidance reminds manufacturers that additions or alterations to hallmarked items may only be made with the written consent of an Assay Office. 

View the original press release and Guidance Notice here

The Sheffield Assay Office was established in 1773, under an Act of Parliament and today the company assays and hallmarks the precious metals - silver, gold, platinum and palladium. Sheffield Assay Office is one of only four UK assay offices who all work to uphold the Hallmarking Act of 1973 and continue to ensure consumer protection for customers purchasing precious metals.

To find out more about the whole range of services offered by Sheffield Assay Office, such as our hallmarking and analytical services, please email us at or complete the contact form on our website at,

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