A silver or gold object that is to be sold commercially is, in most countries, stamped with one or more hallmarks indicating the purity of the metal and the mark of the manufacturer or silversmith
The word "HALLMARK" derives from the fact that, since the 16th century, precious metals were sent to the London Goldsmiths' Hall for testing to ensure that the correct standard of silver had been used. The Goldsmiths' Hall was the headquarters of the Goldsmiths' Company and the home of the Assay Office.
In some countries, the testing of precious metal objects and marking of purity is controlled by a national assay office.
Depending on the national legislation the use of hallmarks may be compulsory, voluntary or provided by a manufacturer's declaration.
The Danish hallmarking system is organized on a voluntary base.

The first Danish hallmarking was made in Copenhagen at the end of the 15th century.
Later, other cities as Aalbotg, Aarhus, Odense and Viborg introduced their own mark as a guarantee of precious metals.
In 1893 the ancient "three-towers" mark of Copenhagen was adopted as the national mark in the new standardized hallmarking system. Copenhagen had the only Assay Office in Denmark. The three towers mark was abandoned in early 1960s.

Ancient Copenhagen Three-tower mark date 1839 Three-tower mark date 1893 Three-tower mark date 1894 Three-tower mark date 1896 Three-tower mark date 1897 Three-tower mark date 1898 Three-tower mark date 1900 Three-tower mark date 1901 Three-tower mark date 1904 Three-tower mark date 1905 Three-tower mark date 1906 Three-tower mark date 1907 Three-tower mark date 1909 Three-tower mark date 1910 Three-tower mark date 1911 Three-tower mark date 1913 Three-tower mark date 1914 Three-tower mark date 1915 Three-tower mark date 1916 Three-tower mark date 1917 Three-tower mark date 1918 Three-tower mark date 1919 Three-tower mark date 1920 Three-tower mark date 1921 Three-tower mark date 1922 Three-tower mark date 1923 Three-tower mark date 1924 Three-tower mark date 1925 Three-tower mark date 1926 Three-tower mark date 1927 Three-tower mark date 1928 Three-tower mark date 1930 Three-tower mark date 1931 Three-tower mark date 1932 Three-tower mark date 1933 Three-tower mark date 1934 Three-tower mark date 1935 Three-tower mark date 1936 Three-tower mark date 1937 Three-tower mark date 1938 Three-tower mark date 1939 Three-tower mark date 1940 Three-tower mark date 1941 Three-tower mark date 1943 Three-tower mark date 1945 Three-tower mark date 1946 Three-tower mark date 1947 Three-tower mark date 1948 Three-tower mark date 1949 Three-tower mark date 1950 Three-tower mark date 1951 Three-tower mark date 1952 Three-tower mark date 1953 Three-tower mark date 1958 Three-tower mark date 1959 Three-tower mark date 1960 Three-tower mark date 1963

The maker's mark and the .826 fineness mark were requested along with the "Three-towers" mark.
The minimum silver standard was .826 unless a higher standard was indicated (from about 1911 Danish silversmiths began using .830 silver).
Denmark: maker's mark A. Dragsted Denmark: maker's mark Georg Jensen Denmark: maker's mark Jens Sigsgaard Denmark: maker's mark Evald J. Nielsen Denmark: maker's mark Carl M. Cohr Denmark: maker's mark Hans Hansen Denmark: maker's mark Carl M. Cohr
Denmark: 826/1000 silver fineness mark Denmark: 826/1000 silver fineness mark Denmark: 826/1000 silver fineness mark Denmark: 830/1000 silver fineness mark Denmark: 830/1000 silver fineness mark Denmark: 925/1000 silver fineness mark Denmark: 925/1000 sterling silver fineness mark Denmark: 925/1000 sterling silver fineness mark Denmark: 925/1000 silver fineness mark Denmark: 925/1000 silver fineness mark

On a voluntary base, silver items could be assayed in Copenhagen and marked with the assay master's mark and the national control mark. In 1988 the assay master's mark was discontinued.
Assayer's mark: Simon Groth, 1863-1904 Assayer's mark: Christian F. Heise, 1904-1932 Assayer's mark: Johannes Siggaard , 1932-1960 Assayer's mark: Gerhard Hansen, 1960-1971 Assayer's mark: Steen Oxholt Hove, 1971-1974 Assayer's mark: J. Beyer, 1974-1988
1 Assayer's mark: Simon Groth, 1863-1904 - 2 Assayer's mark: Christian F. Heise, 1904-1932 - 3 Assayer's mark: Johannes Siggaard, 1932-1960 - 4 Assayer's mark: Gerhard Hansen, 1960-1971 - 5 Assayer's mark: Steen Oxholt Hove, 1971-1974 - 6 Assayer's mark: J. Beyer, 1974-1988

Other Copenhagen assayer's marks
Assayer's mark: Peter R. Hinnerup (1840-1863)
Peter R. Hinnerup (1840-1863)

Georg Jensen and other major Danish manufacturers added a further mark identifying the designer
Henning Koppel (1918-1981) Bent Gabrielsen (1918-) Nanna Ditzel (1923-2005) Vivianna Torun Bulow-Hube (1927-2004)

In 1988 Denmark became member of the Hallmarking Convention and a revised version of the national control mark was introduced.
The minimum official silver fineness is .800. Mark "800" (or any other higher value as 925) may be followed by the letter "S"). In articles with silver content of at least 925 per mille silver, the fineness may solely be given the designation "STERLING" (a practice largely used for silver made for export). A slightly different version of the "three-tower" was adopted and is now in use.
Danish Assay Office mark from 1988

Examining the marks on many pieces of 20th century Danish silver, it becomes apparent that adherence to the marking law was either at the discretion of the maker or very lax in enforcement. Many of the larger firms such as George Jensen, Hans Hansen and Carl Cohr, rarely had official assay marks on their silverware and jewelry, no doubt these names inspired trust and their customer base did not require the added credence of state control marks. However, smaller firms and individual silversmiths did tend to follow the law, as official state marking did inspire confidence in their customers.
As the 20th century progressed, the official state hallmarks are found less and less, they were officially retired in 1977, it had already become common practice for pieces to be marked only with the maker's initials, 925S and sometimes Sterling and "DENMARK" as a mark of origin (in early 20th century also COPENHAGEN mark was used).
DENMARK mark of origin COPENHAGEN mark of origin

A mark often present in Danish silver is the "Thor's hammer" (a god of German mythology). This mark is the sign of private Danish Trade Promotion Association "Landsforeningen Dansk Arbejde" (Promotions signification: "Quality Product - Made in Denmark" and "Buy Danish Quality Products") from 1908 on - with promotional activities for all kind of Danish products - not only for Silver or Plated - in Denmark and abroad. "DA" is since 2002 part of a Danish merger for Worldwide Trade Promotion.
3 Stars, Cohr silverplate symbol

When Cohr started 1921 his plated product range in flatware and hollowware - didn't exist a nationwide symbol for this. Some time later were used the letter P (in a circle, signification = Plet = Plated) and introduced the "Two towers" mark, to be used by all Danish producers of plated products. That's failed until 1929, because there wasn't any guarantee of similar quality standard.
DS - Danish Standards Association Founded in 1926. Denmark's national standardisation body. DS marking is the visible evidence that a product meets the requirements laid down, for instance, in a standard covering the particular product group. Cohr used DS marking from 1931 on.
Torch mark FDG: In 1929 the "Common Representation of Danish Goldsmiths" (FDG = Fællesrepræsentationen for Danmarks Guldsmede) registered the "Torch mark" as a trademark and wanted it to be used as a quality mark for silver plated sold by the members only.
Torch mark: Quality mark for silver plated. Used by the "Organisation of Silver plate Manufactures" ("Foreningen af Sølvpletfabrikanter") after they took over the rights to the torch mark from FDG about 1932.
A wide array of marks was used on Cohr's silverplate. Three Stars is a symbol used in signification of "Plated" quality - from 1926 on traded as ATLA (signification: strong surface and resist use attacks) Cohr's trademark.
3 Stars, Cohr silverplate symbol Cohr silverplate mark Cohr silverplate mark Cohr silverplate mark

Other silverplate manufacturers use the "two-tower" mark and the "P" (Plet = Plated) into a circle.
two-tower silverplate mark two-tower silverplate mark ABSA(Amager factory) silverplate mark 'P' into a circle Denmark silverplate mark: 'two towers' and 'P'

by nobelantik.dk
The initials/name on the mark can be reused by another silversmith for a period after the previous user has completed his business. However, the same initials/name is never used by two silversmiths in the same year.

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Denmark is since 1988 a country member of the Convention on the Control and Marking of Articles of Precious Metals, an international treaty between States on the cross border trade in precious metal articles. It was signed in Vienna in November 1972 and entered into force in 1975.
The Convention's Common Control Mark (CCM) has the same legal status as a national Assay Office mark. The CCM is applied by national Assay Offices to articles of platinum, gold, palladium and silver after the fineness of the alloy has been checked in accordance with agreed testing methods.
Articles bearing the CCM - together with the national Assay Office Mark, the responsibility mark (manufacturer or sponsor) and the fineness mark indicating its purity - do not have to be re-controlled or re-marked in the states members of the Convention.
Common Control Mark (CCM) in Denmark

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