How to Read Hallmarks on Gold and Silver
A hallmark is the closest thing jewelry has to a birth certificate. It can give you the metal, the standard, the city and, in Britain and Scandinavia, the exact year. It can also be entirely absent from a perfectly genuine antique, which is why knowing what a mark cannot tell you matters as much as knowing what it can.
Strictly, a hallmark is a mark struck by an official assay office after the metal has been tested. Loosely, people call any stamp on jewelry a hallmark. The distinction is the whole subject: an assay office mark is a guarantee backed by law, and a 925 stamped by a factory in a country with no assay system is a claim made by whoever wanted to sell the piece.
Where to look before you decide it is unmarked
Most pieces declared unmarked are not. Marks are struck where they will not show and where the metal is thick enough to take a punch without buckling.
- Rings. Inside the shank, usually opposite the setting. Sizing removes them, which is why old rings so often appear blank.
- Brooches. On the pin stem, on the catch plate, or on the flat of the frame beside the hinge.
- Earrings. On the post, on the clip plate, on the very edge of the back.
- Chains and bracelets. On the clasp, on the jump ring beside it, or on a small separate tag. A marked clasp tells you about the clasp, and clasps are replaced constantly.
- Pendants and lockets. On the bail, around the rim, or inside the back cover.
Use a 10x loupe and light coming from the side. Overhead light flattens a worn mark into invisibility; raking light throws the remaining depth into relief and often brings back a mark you were certain was not there.
The four punches of a British hallmark
British hallmarking has run continuously since 1300, which makes it the most complete dating system in the trade. A full mark is read as four separate pieces of information.
| Punch | What it tells you | Example |
|---|---|---|
| Sponsor's mark | Who submitted the piece for assay, often but not always the maker | Initials in a shaped surround |
| Standard mark | The fineness of the metal | Lion passant for English sterling, 750 for 18 carat gold |
| Assay office mark | Which office tested it | Leopard's head London, anchor Birmingham, rose Sheffield, castle Edinburgh |
| Date letter | The year of assay | A letter, whose typeface and surround shape fix the cycle |
Two extra marks appear often enough to know. The duty mark, a profile of the reigning monarch, was struck between 1784 and 1890 to show excise duty had been paid, and it brackets a British piece into that window on sight. From 1904, imported precious metal had to be assayed in Britain too, and carries a distinct set of office marks, which means a British hallmark does not always mean British manufacture.
Reading the Continental systems
Britain marks the year. Most of Europe marks the standard and the country, and leaves you to date the piece by other means.
France. The most rigorous system after Britain's, and the smallest marks. An eagle's head guarantees 750 gold from 1838 onward. A helmeted Minerva head marks silver, with a numeral 1 for the 950 first standard and 2 for 800. A boar's head was used on small Paris silver until 1961, replaced nationally by a crayfish in 1962, which splits French silver jewelry neatly in two. An owl indicates gold imported into France from 1893.
Germany. A crescent moon beside a crown, together with a fineness figure such as 800 or 835, introduced by law in 1888. This is a hard floor: the mark cannot appear on anything made earlier.
Denmark. Three towers in a row, the Copenhagen town mark, usually with two digits underneath giving the year of assay. Three towers over 24 means 1924. Alongside it sits an assay master's initials, which narrow it further: SG for Simon Groth until 1904, CFH for Christian F. Heise from 1904 to 1932, JS for Johannes Siggaard from 1932 to 1960. Danish silver standards of 826 and 830 are marked with an S for silver.
Sweden. Three crowns in a triangle for the national mark, plus a town mark, a maker's mark and a date letter running in twenty-four year cycles from A in 1759, with a numeral added each time the cycle restarts. Four marks together in this pattern is Swedish on sight, even before you decode the letter.
Russia. The imperial system expressed fineness in zolotniks out of 96, so 84 is 875 silver and 56 is 583 gold. The kokoshnik mark, a woman's head in traditional headdress, faces left from 1899 to 1908 and right from 1908 to 1917, which splits imperial work into two nine year windows. From 1927 the Soviet Union used metric figures with a hammer and sickle in a star, replaced from 1958 by a worker's head in profile.
Italy. From 1968, a star, a manufacturer's number and a two-letter province code such as MI for Milan. Nothing Italian carries this mark before 1968.
Any of these can be looked up directly in the hallmark decoder.
What a mark cannot tell you
It cannot tell you the piece was made when the metal was tested. Assay happens to the metal. A hallmarked gold blank made in 1901 and finished into a brooch in 1908 carries a 1901 date letter and is honest in doing so.
It cannot survive alteration. Resizing a ring removes the section with the marks in it. Converting a brooch to a pendant means a new bail with no marks and an old body with marks that no longer describe the object.
It cannot prove anything on a clasp. Clasps are the most replaced component in jewelry. A sterling clasp on a base metal chain is an ordinary repair, not a lie.
It cannot be trusted where no office existed. The United States has never had a compulsory assay system. American marks are trademarks and statements made under the National Gold and Silver Stamping Act of 1906, enforced after the fact rather than tested in advance. STERLING on an American piece is usually honest; 925 stamped on an unattributed modern import means only that somebody owned a 925 punch.
Marks that mean the piece is not solid
These are the marks that end more hopes than any others, and they are worth reading carefully rather than quickly.
| Mark | What it means |
|---|---|
| EPNS, EP, EPBM, A1 | Electroplated. A skin of silver over base metal, with no solid silver beneath |
| GF, RGP, 1/20 12K GF | Gold filled or rolled gold. Real gold bonded to a base core, thick and durable, but not solid |
| GP, GE, HGE, 18KGP | Gold plated or electroplated. The carat figure describes the plating only |
| Nickel silver, German silver, Alpacca | An alloy of copper, nickel and zinc containing no silver at all |
| Vermeil, silver gilt | Gilded sterling. The body underneath is precious, so this one is the exception |
The most misread of these is 18KGP. It means plated with 18 carat gold, not made of it, and the difference accounts for a great many disappointed inheritances.
A working order for an unfamiliar mark
- Photograph it through the loupe before you clean anything. Marks vanish under polish.
- Identify how many separate punches there are. One punch is a claim; four in a row is a hallmarking system.
- Read the figure first, if there is one, since fineness is the least ambiguous element.
- Identify the country from the symbols, not the figure. The same 800 appears in Germany, Italy and Austria.
- Only then look for a date, and only expect one from Britain, Ireland or Scandinavia.
- Sanity check the answer against the object. A mark saying 1890 on a piece with a clip-back earring fitting means the mark and the fitting cannot both be original.
Frequently asked questions
What does a hallmark actually guarantee?
An assay office hallmark guarantees the fineness of the metal, meaning the proportion of precious metal in the alloy, as verified by testing before the piece was sold. It does not guarantee age, maker, quality of workmanship or value.
Why does my antique gold ring have no hallmark?
Three ordinary reasons. Hallmarking was never compulsory in every country or for every weight of item. The marks were struck on the shank and removed when the ring was sized. Or the piece was made for export, where different rules applied. An absence of marks is common on genuine antique gold and proves nothing either way.
What is the difference between a hallmark and a maker's mark?
A maker's or sponsor's mark identifies who submitted the piece and is only one of the punches in a hallmark. A full hallmark also carries the standard mark, the assay office mark and, in some countries, a date letter.
How do I find out what year my silver was made?
If it carries a British, Irish or Scandinavian date letter, the year can be read exactly, provided you match the letter with its typeface and surround shape against the correct office's table. Danish three-tower marks carry the year as digits, which is simpler. Most other countries do not date-mark at all.
Is 925 a hallmark?
Only when it is struck by an assay office alongside the other required punches. On its own, 925 is a fineness claim. In hallmarking countries it will be accompanied by an office mark; where it appears alone it should be treated as unverified until the metal is tested.