What does the Britannia hallmark mean?
Short answer
Britannia: 958 silver.
A mark is a statement, not proof: it can be forged or struck on a plated piece. An assay confirms it (touchstone and acids, or X-ray fluorescence).
The stamp in detail
| Item | What the tables say |
|---|---|
| Stamp | Britannia |
| Class | Hallmark symbol |
| Silver fineness | 958 parts per thousand (95.8 % silver) |
| Legal standard (silver 958) | United Kingdom, Vienna Convention states |
| Note | Britannia silver (958.4). |
| Source check | Checked against the sources listed below |
| Date clue | Not before 1697. Britannia silver was introduced in 1697. |
What Britannia can be mistaken for
Pieces that look like silver and are not:
- silver plate (EPNS)
- alpaca, nickel silver
- white gold and platinum
What a stamp cannot settle: Silver, white gold or platinum without marks: white colour does not tell them apart.
What settles it:
- Jeweller: acids or X-ray fluorescence.
Related stamps
Other ways the same fineness is stamped: 958.
Also in this group: lion passant, leopard head, anchor, rose, castle, crown, orb, sovereign head.
Frequently asked
What does Britannia mean on jewelry?
Britannia: 958 silver.
Is the Britannia mark proof of the metal?
A mark is a statement, not proof: it can be forged or struck on a plated piece. An assay confirms it (touchstone and acids, or X-ray fluorescence).
Sources
- The Goldsmiths' Company Assay Office, History of hallmarking
- Hallmarking Act 1973, Schedule 2 (revised text)
- Vienna Convention on precious metals, Technical Decisions Rev. 13 (in force 1 Oct 2026)
All sources are listed with the method on the sources page.