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Guaranteeing Quality and Protecting Consumers
In Britain, Hallmarking has a long history dating back 700 years – representing the earliest form of consumer protection.

A hallmark means that the article has been independently tested by an Assay Office and guarantees that it conforms to a specified legal standard of purity. This is called the fineness of the metal and the precious metal content is expressed as a millesimal number. There are four Assay offices in Great Britain:

London, Birmingham, Sheffield and Edinburgh. Each has its own identifying mark:

Signets & Cyphers rings are hallmarked by the London Assay office so they will have the Leopard’s head inside the band.