By Adrienne Murray
A rare cassette recording of John Lennon and Yoko Ono will be auctioned in the Danish capital Copenhagen on Tuesday.
The 33-minute audio track was made by four Danish teenagers more than 50 years ago, and just months before The Beatles announced their break up.
It features an interview with the couple and what is believed to be a never-released song.
The auction house selling it estimates it could fetch between $32,000-50,000 (£23,000-£36,000) and is likely to go to a museum or collector.