Unpublished early colour photographs of The Beatles' first U.S. tour will be sold at a U.K. auction.
The photos were taken during the rock band's 1964 visit to the U.S., when colour film was expensive and most images of the group were in black and white.
The collection of 65 slides contains many stage shots, including George Harrison with his legendary red Rickenbacker guitar and close-up portraits from a Las Vegas Sahara Hotel press conference and Las Vegas Convention Centre gig.
The images were taken by Dr. Robert Beck, who died in 2002 and left them in an archive of photographs and slides in his Hollywood home.
Omega Auctions said the images will be sold March 22 -- exactly 50 years after The Beatles released their first album.