found: Priddey, Neil. Purple Records, 1971-1978, 2017:back cover (Purple Records; "vanity" record label of rock group Deep Purple, founded in 1971; the label signed a diverse range of additional artists)
found: Wikipedia, January 31, 2019:Purple Records (record label established in 1971 by Deep Purple's management; their releases were distributed by EMI; the label was run until 1979)