Scandinavian Hallmarks: How to Read Danish, Swedish, Norwegian and Finnish Marks

The short answer

Each Nordic country has its own national symbol, and that symbol is the fastest way to tell where a piece of gold or silver was marked: three towers for Denmark (Copenhagen), three crowns for Sweden, a crowned lion holding an axe for Norway, and a crown in a heart-shaped outline for Finland. Next to it you will usually find a fineness figure (830S, 925S, 750 and so on) and a maker's or responsibility mark, and on older Swedish and Finnish pieces a date letter. Today the Hallmarking Convention describes Norway's and Finland's systems as voluntary, Denmark's as compulsory registration with voluntary control marking, and Sweden's as mixed, so on many modern Nordic pieces the fineness figure is the maker's legally backed claim, and an independent assay mark, where present, is extra evidence.

Denmark: three towers and the assay master

Danish hallmarking began in Copenhagen at the end of the fifteenth century, and towns such as Aalborg, Aarhus, Odense and Viborg later used their own marks. In 1893 the old three-towers mark of Copenhagen became the national mark, and Copenhagen had the country's only assay office. The minimum silver standard was 826 unless a higher one was stated, and Danish silversmiths moved to 830 in the 1910s. The three-towers mark carries the year of marking, which makes it the most precise date on Danish silver.

The towers were struck together with the assay master's own mark, which is a second dating aid. The assay masters included Simon Groth (1863 to 1904), Christian F. Heise (1904 to 1932), Johannes Siggaard (1932 to 1960), Gerhard Hansen (1960 to 1971), Steen Oxholt Hove (1971 to 1974) and J. Beyer (1974 to 1988); the assay master's mark was discontinued in 1988. The towers themselves fell out of use in the early 1960s.

Marking was largely voluntary, and big makers such as Georg Jensen, Hans Hansen and Carl Cohr rarely used the official marks. Most twentieth-century Danish silver is marked with the maker's mark, 925S or 830S, and often 'Sterling' and 'Denmark'. Two marks catch buyers out: two towers means silver plate, and the Thor's hammer mark is the emblem of a Danish trade-promotion association, used since 1908, not a fineness mark. Our Georg Jensen guide shows how these marks date one maker's work.

Today Denmark has been a member of the Hallmarking Convention since 1988, its minimum official silver fineness is 800, and silver of at least 925 may be marked 'Sterling'.

Sweden: three crowns and a date letter for every year

Sweden has the longest continuous dating system in the region. State control of silver fineness began in 1752, the national control mark followed in 1754, and in 1759 Sweden introduced a date-mark system of a letter and a number that is still running. The present form of the control mark, three crowns from the Swedish coat of arms in a trefoil with a striated background (the cat's paw), dates from 1901.

A complete older Swedish set has four parts:

• Three crowns in a trefoil: made in Sweden. Three crowns in an oval marked imported silver from 1912 to 1988.
• S in a hexagon: a minimum silver standard of 800; 830 and 925 are also common.
• Town mark: standardised after 1912 as an initial in a square or circle, about 140 of them; Stockholm alone uses a crowned figure.
• Date mark: a letter and number, read from a published table. One dealer's example, a piece marked U10, dates to 1994.

Since 1988 the town and year marks have been optional, so a modern Swedish piece may carry only the maker's mark and fineness. The Hallmarking Convention profile describes Sweden's current system as mixed, with RISE in Borås as the authorised assay office.

Norway: the crowned lion and 830S

Norway's modern hallmarking system came into effect after an act of 1891. Its national symbol is a crowned lion rampant holding a battle axe, in a circular frame, struck with the fineness mark and the maker's mark. In 1892 the silver standard was fixed at 830 and the 830S mark became compulsory; from 1920, 925 began replacing 830. Today 999, 925, 830 and 800 are permitted for silver, and 925 is the standard most used.

You will often see NM on Norwegian silver. It stands for Norskt Mønster, Norwegian pattern, and works as a design-protection mark, not a fineness mark. Norway's system is voluntary, Justervesenet is the authorised assay office, and the country has been a member of the Hallmarking Convention since 1983.

Norwegian traditional jewellery such as the sølje, the brooch worn with folk dress, is commonly made in silver, often gilded. Our filigree guide explains how wirework of this kind is made and judged.

Finland: a crown in a heart and five marks

Finnish hallmarking was compulsory from 1754 and used the Swedish system, with date marks from 1759. In 1810 Finland adopted its own national mark, a single crown in a heart-shaped outline, and its own sequence of date letters. Between 1925 and 1998 a crown in an oval marked imported items. From 1891 fineness was given in parts per thousand, followed until 1973 by the letter H, for hopea, the Finnish word for silver. Town marks are symbols, names or initials; about 35 are approved today.

A full older Finnish set therefore has up to five marks: maker, town, fineness, national crown and date letter. Today, articles sold in Finland must carry a responsibility mark and a fineness mark registered with Tukes, the Finnish Safety and Chemicals Agency, or a hallmark and fineness mark from an approved assay office. A responsibility mark is a capital letter or combination of capital letters, and its registration must be confirmed every three years.

Gold standards: what the numbers mean

Gold is marked the same way, in parts per thousand, and the Hallmarking Convention's country profiles list the legal gold standards in each country. The ones a buyer will meet most are 375 (9 carat), 585 (14 carat), 750 (18 carat), 916 (22 carat) and 999. Denmark and Sweden also list 417, 800 and 990; Norway and Finland list 375, 585, 750, 916 and 999. The profiles carry a note that they are informative and may not be current, so for a high-value item the authorised assay office is the authority.

Two practical points follow. First, a Nordic fineness figure is often the maker's legally backed claim, not an independent test, so on a large purchase it is worth testing the metal as well. Our guide to testing gold at home ranks the methods. Second, once you know the fineness you can work out what the gold itself is worth, using our gold price per gram calculator method.

The Common Control Mark across the region

All four countries are contracting states of the Convention on the Control and Marking of Articles of Precious Metals, signed in Vienna in 1972: Finland and Sweden from 1975, Norway from 1983 and Denmark from 1988. Each recognises the Convention's Common Control Mark, a pair of balance scales within a shape that indicates the metal, applied by an authorised assay office after testing and shown with the fineness figure. Sweden's profile also recognises all assay office marks within the European Economic Area, and Finland's recognises foreign assay office marks where the other country's legislation meets Finnish requirements.

For how these systems compare with the British one and with countries that have no assay system at all, see our guide to hallmarks beyond the UK.

A quick reading routine

• Find the national symbol first: towers, crowns, lion or a crown in a heart tells you the country, and an oval around crowns tells you it was imported.
• Read the fineness: 826, 830, 925 for silver; 585, 750 and the rest for gold. A two-towers mark means plate.
• Look for a date: the year in a Danish three-towers mark, or a Swedish or Finnish date letter, read from a published table.
• Identify the maker: a registered maker's or responsibility mark, and on Danish design silver, often a designer's initials.
• Check that everything agrees: a 1930s date with a fineness or maker that did not exist then is a reason to stop.
• Test before a large purchase: in these countries the mark is evidence, not proof.

The tradition behind these marks goes back to the medieval goldsmiths' guilds, as our history of gold in Scandinavian culture explains.

Sources

• hallmarkingconvention.org/en/country-profile/denmark
• hallmarkingconvention.org/en/country-profile/sweden
• hallmarkingconvention.org/en/country-profile/norway
• hallmarkingconvention.org/en/country-profile/finland
• silvercollection.it/DICTIONARYEUHALLMARKDENMARK.html
• silvercollection.it/DICTIONARYEUHALLMARKSWEDEN.html
• silvercollection.it/DICTIONARYEUHALLMARKNORWAY.html
• silvercollection.it/DICTIONARYEUHALLMARKFINLAND.html
• suomi.fi/services/responsibility-mark-on-articles-of-precious-metals-finnish-safety-and-chemicals-agency-tukes/9a388969-ae3a-4d00-9bd6-40dc6b17e1c9
• jensensilver.com/georg-jensen-hallmarks
• en.wikipedia.org/wiki/Hallmark

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