It became a worldwide hit when it was used as the theme song for the movie "The Exorcist," and won the Grammy Award for Best Pop Instrumental in 1974.
The best-selling album, which has sold more than 15 million copies worldwide to date, is now being released in an updated version under the supervision of Mike Oldfield himself.
The 50th anniversary will be celebrated with a bonus track, "Tubular Bells/In Dulci Jubilo," which was performed at the opening ceremony of the 2012 London Olympics.
Tubular Bells (Mike Oldfield & Yorke Remix)" from "Tubular Beats," a collaboration album by Oldfield and German DJ/producer Yorke released in 2001.
The album also includes an unreleased 8-minute demo of "Tubular Bells 4 Intro" from the sessions for the sequel to "Tubular Bells," which was newly worked on after the release of "Return To Ommadawn" in 2005.