Tom Petty box set Origins 1971-78 contains 27 unreleased or previously unheard tracks

Origins 1971-78, the Tom Petty and the Heartbreakers box set released Friday, 6 November, contains 51 tracks, 27 of them unreleased, live, extended or previously unheard, according to the Tom Petty store. It includes a previously unreleased 1977 live recording from the Record Plant. Formats run from a five-LP box set to a 4CD set.