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Black Mark Production (founded 1991) is an independent record label originally based in Berlin, later on with offices in Stockholm, Toronto and New York City etc. Black Mark Productions today is a worldwide operating business placed in Villa Hammerheart, Bruzaholm, Sweden, that specializes in extrememetal releases, perhaps best known for its close connection to Quorthon, leader of the defining black metal band Bathory until his death in 2004. As Quorthon himself has stated several times, it was often speculated that he had something to do with the business and operation of Black Mark Productions, except for the concept and name of the label, which would be referenced in the title of the 1987 release Under the Sign of the Black Mark.Quorthon received permission from the Tyfon Grammofon label - which was owned by Börje "Boss" Forsberg and of course featured Bathory - to use his own proxy-label on all Bathory albums, along with a unique 666-X serial number, starting with the self-titled debut album from 1984, but the label wasn't founded as a separate entity before 1991. Who did found it remains disputed, but many point to Boss Forsberg.