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Hallmark research

Trace a UK hallmark

Read the whole mark, then follow the right archive.

The Goldsmiths’ Company

Research the components of a UK hallmark, with particular help for historic London marks and the questions a mark cannot answer.

Read Goldsmiths’ hallmark guidance (opens a new tab)
Best for
Investigating a possible UK hallmark, especially historic London silver.
Bring with you
Clear photographs of every mark, a whole-object view, dimensions and any existing attribution.

Read the marks, then examine the object

  1. Complete groupRecord every mark and its position on the object.
  2. Assay officeChoose the relevant office’s references.
  3. Fineness + sponsorRead metal claims and submitting sponsor separately.
  4. Date comparisonCompare the letter and shield when a date letter is present.
  5. Whole objectConsider construction, repairs and examination alongside the reading.
Historic London research is the focus of the linked guidance. A plausible reading does not establish authenticity, ownership or value.

Read the group, not one familiar symbol

A useful hallmark enquiry begins with the complete group of marks. The Goldsmiths’ Company explains the different jobs they do: identifying the submitting sponsor, metal fineness, assay office and, when present, the hallmarking year. A sponsor may be the maker, but the mark records who submitted the item, so do not automatically turn initials into a personal maker attribution.

The Company’s component guide describes London’s full traditional hallmark. It is a reference for understanding the system, not a promise that every historic or modern object will carry an identical arrangement. A hallmarking date records testing and marking; keep it distinct from an unsupported claim about the exact manufacturing date.

Build a reading you can check

  1. Locate the assay-town mark before choosing a date table. London’s mark is a leopard’s head; use the relevant office’s references rather than a table selected only because a letter looks familiar.
  2. Compare the fineness marks with official examples. Silver-plated objects can carry stamps that resemble hallmarks, so resemblance alone is not enough.
  3. Record the initials and surrounding shield together. Identical initials can belong to different sponsors; the outline is part of the evidence.
  4. If there is a date letter, compare its form with that office’s table. Date letters became optional in 1999, so absence is not itself a warning sign.

Keep the evidence attached to the reading

Photograph the whole object as well as the marks, and preserve the original image files. In your notes, separate what you can actually read from your interpretation: “second letter unclear” is more useful than a confident guess. Give each tentative match its source and record competing possibilities instead of silently replacing them.

If the object has detachable parts, record where each mark occurs. A reading from one component should not become an unqualified description of every component. Keep construction, repairs, provenance and any professional examination alongside the hallmark research.

Choose the right enquiry route

The linked guide concerns historic London hallmarks. The Library and Archive team offers identification support for pre-1975 marks and requires clear images; research visits need an appointment. For newer London marks, follow its London Assay Office contact route. Some recent sponsor information may be unavailable.

A plausible mark reading is one piece of evidence, not universal authentication, proof of ownership or a valuation. If a purchase depends on the attribution, have the object and its construction examined by an appropriate specialist before relying on the conclusion.

Sources & further reading

  1. Hallmarking (opens a new tab)

    The Goldsmiths’ Company · Publication/update date not stated in the reviewed source. Checked 2026-11-05.

  2. How to trace an historic London hallmark (opens a new tab)

    The Goldsmiths’ Company · Publication/update date not stated in the reviewed source. Page displays 3 Jan without a year; no complete publication date verified. Checked 2026-11-05.

Diagrams by Collect Silver.

Sources reviewed .