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Optional extra marks struck to mark a national occasion.
Also known as: Jubilee mark, Millennium mark, Extra mark on silver
Occasional additional marks struck for coronations, jubilees and millennia. They carry no information about the metal at all — which is worth knowing, because an unfamiliar extra mark in a row invites the assumption that it must mean something technical.
Optional additional marks struck by UK assay offices to mark national occasions, including coronations, royal jubilees and the millennium.
Contexts: Jewellery
Carry no information about the metal, the maker or the standard, and are struck by request rather than by requirement — so an unfamiliar extra mark in a hallmark row may simply be commemorative.
Precisely datable by definition, which makes them a firm dating aid where present.
An additional small emblem struck alongside the required marks — a crown, a cypher or a dated device — inside its own outline.