Dating london silver hallmarks
This is the unique mark of the company or person responsible for sending the article for hallmarking.The sponsor may be the manufacturer, importer, wholesaler, retailer or an individual.To obtain a sponsor’s mark you must register with an assay office.
For example 750 parts per 1000 by weight is equivalent to the old 18 carat gold standard.
The alloy must be at least 750 parts per 1000 to be marked as such. This symbol shows which assay office tested and marked the item.
The Anchor is the symbol of Assay Office Birmingham .
The date letters below show the background shape for silver.
The same letters were used for Gold, which has been marked in Birmingham since 1824, but with a background of a square with cut corners.
There may be some variations in backgrounds during the late 19th century, especially on watch cases.In Birmingham the date letter changes in July up to 1974.From 1975, all Assay offices have the same date letter which changes in January.Depending upon the font used for the series of date letters, the letter i, j or l is usually omitted to avoid any possible confusion between them.As a result the date letter cycle is usually 25 years as opposed to 26.For example, due to the very simplistic font currently in use, it was decided that the letter ‘i’ should be omitted in 2008, with ‘j’ used instead and ‘l’ used in 2010.If you'd like to see Date Letters from other Assay Offices, you can find out more information with our Help with Hallmarks App.BRITISH TOWN MARKS AND DATE LETTERS A object that is to be sold commercially is, in most countries, stamped with one or more silver hallmarks indicating the purity of the silver, the mark of the manufacturer or silversmith, and other (optional) markings to indicate date of manufacture and additional information about the piece.In some countries, the testing of silver objects and marking of purity is controlled by a national .Hallmarks are applied with a hammer and punch, a process that leaves sharp edges and spurs of metal.Therefore, hallmarking is generally done before the piece goes for its final polishing.