http://www.legislation.gov.uk/ukpga/1973/43/schedule/1/paragraph/5/enactedHallmarking Act 1973HallmarkingDescription of goodsKing's Printer of Acts of Parliament2022-10-18SCHEDULESSCHEDULE 1Unhallmarked ArticlesPART IIExempted Articles5Any battered article of gold, silver or platinum fit only to be remanufactured.