The Year of Bowie marches on.

A previously unheard radio programme recorded by David Bowie as a promotional tool for his 1973 album Pin-Ups is to be broadcast for the first time on BBC 6 Music tomorrow. Update: Stream the show below.

The 15-minute mock radio show was produced by Bowie and his producer at the time, Ken Scott, and features Bowie introducing five of the tracks featured on his album of covers –  The Pretty Things’ ‘Rosalyn’, Them’s ‘Here Comes the Night’, The Yardbirds’ ‘I Wish You Would’, The Merseys’ ‘Sorrow’ and The Who’s ‘I Can’t Explain’.

The recording was unearthed by Nigel Reeve, who oversees Bowie’s back catalogue. “It was in an old tape vault on 1/4” tape with simply the words ‘Radio Show’ written on it,” explained. “This is such a rare find. No one knew of its existence, apart from David and Ken. To play it for the first time was quite simply a jaw-dropping moment.”

The clip will be played in five parts throughout the day tomorrow (Wednesday, October 23) and will also be available to listen to until midnight on Sunday on the 6 Music website.

Since surprising everyone with the release of his album The Next Day at the start of the year, Bowie has returned to the headlines if not the stage – most recently he’s shared his list of favorite books, been remixed by James Murphy and been named history’s best-dressed Brit.