British silver hallmarks: how to read the marks on your silver

A British hallmark is a short row of punched marks. Since 1999 three are compulsory: the sponsor's mark (who sent the piece for testing), the fineness mark (925 for sterling) and the assay office mark (leopard's head for London, anchor for Birmingham, rose for Sheffield, castle for Edinburgh). Older pieces add a lion passant and a date letter, which together let you place a piece in its town and year.

By the Antique ID team · Updated 2026-10-13

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Why British silver is so well documented

Britain has one of the oldest consumer protection systems in the world. According to the Assay Office London, a statute of Edward I in 1300 required silver to be of the sterling standard, 92.5% pure, and appointed guardians to test it and strike it with a leopard's head. A maker's mark was added in 1363, a date letter in 1478, and the walking lion, the lion passant, in 1544. Because each mark was applied by an independent office after testing, a full set of marks tells you not only that the metal is silver but also where and, usually, in which year it was tested.

This is very different from a maker's stamp such as "925" or "STERLING" on its own, which is only the maker's claim. In the UK it is illegal to describe an item as silver, gold, platinum or palladium unless it is hallmarked, subject to small exemption weights; for silver the threshold on the current dealer's notice is 7.78 grams.

The three compulsory marks

1. Sponsor's mark

The sponsor's mark, historically called the maker's mark, is a set of initials inside a shaped shield. It identifies the registered company or person who sent the piece to the assay office. It may be the actual maker, a retailer or an importer. During the Britannia period, from 1697 to 1720, makers used the first two letters of their surname; otherwise initials are the norm. Sponsor's marks are registered with the assay offices, which is how researchers attribute antique silver to particular workshops.

2. Fineness mark

The fineness mark states the precious metal content in parts per thousand. For silver the current UK standards are 800, 925 (sterling), 958 (Britannia) and 999. Before 1999 the standard was shown only by a symbol: the lion passant for sterling in England, the thistle and later a rampant lion in Scotland, and the figure of Britannia for the higher standard. Today the number is compulsory and the traditional symbol is optional, so a modern piece may show both.

3. Assay office mark

Each assay office has its own town mark. Four offices operate in the UK today, and several historic offices closed long ago, which makes their marks especially useful for dating.

Other historic English offices, including Exeter, Newcastle, York and Norwich, also had their own marks before they closed in the 18th and 19th centuries. If a piece has a town mark you cannot place, a published table of marks or the assay offices' own resources will usually identify it.

The optional marks that help with dating

The date letter is a single letter in a shaped shield. The letter, its typeface and the shape of the shield changed every year, and each office ran its own cycle until the 1973 Hallmarking Act standardized the letter across the offices. It became optional in 1999. See how to read hallmark date letters for a step-by-step method.

The duty mark, a profile of the reigning monarch, was added in 1784 when a tax was placed on gold and silver wares and dropped in 1890 when the tax ended, according to the Assay Office London. A head facing left or right can therefore confirm that a piece belongs within that bracket. The Britannia figure, together with a lion's head erased, marks the higher 95.84% standard, which was compulsory from 1697 to 1720 and has been an optional alternative since.

The Common Control Mark (convention mark) is recognized by countries that signed the International Convention on Hallmarking; the UK ratified it in 1975. It appears alongside a fineness figure on items marked in the UK or abroad.

A quick method for any piece

1. Find the marks. On flatware they are on the back of the stem; on hollowware look under the base, beside the handle or on the rim. Use a 10x loupe and raking light.
2. Identify the town mark first, because it tells you which table of date letters to use.
3. Note the standard: lion passant, thistle, Britannia or a number.
4. Look for a duty head, which places the piece between 1784 and 1890.
5. Read the date letter against that office's table: letter, case, typeface and shield outline must all match.
6. Look up the sponsor's initials in a register of makers' marks.

Fakes, transposed marks and look-alikes

Pseudo-hallmarks are a long-standing trap. Silver-plated wares from the 19th and 20th centuries often carry small shields with initials, symbols or letters designed to look like hallmarks; if there is no recognizable town mark and no standard mark, treat the item as plate until proven otherwise. See sterling vs silver plate marks.

The Silver Society also points out that Old Sheffield Plate (from the 1740s) and electroplate (from about 1840) carry no silver hallmarks at all, and that pewterers sometimes struck imitation silver marks too.

Real fakes are more serious. Marks cut from a small, cheap hallmarked piece have been set into a larger, later object to make it look older; a visible solder line around the marks is the warning sign. Marks that are unusually crisp on an otherwise worn piece, marks that line up perfectly on a hand-raised object, or marks in an odd position deserve a second opinion. Assay offices and specialist dealers can examine suspect marks.

What drives value

Hallmarks establish the metal and often the date and maker, but value also depends on the weight of silver, the quality and rarity of the design, the maker's reputation, condition (dents, repairs, removed engraving, thin spots from polishing) and provenance. Pieces from closed offices such as Chester or Glasgow, early dates and important makers attract collector interest beyond metal value. For a first read on an unknown piece, photograph the marks and the whole object and scan them with Antique ID: it reads visible marks, suggests a maker and period and gives an estimated value range. An estimate is not an appraisal, so for pieces that may be important, ask a silver specialist or a qualified appraiser.

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