The Beatles arriving in New York City in 1964

A collection of unpublished color photos of The Beatles from 1964 will go up for auction in the U.K. in March. The rare photos were taken during the band’s first tour of the United States, and will be sold to mark the 50th anniversary of the release of their first album Please Please Me. The pictures were taken by physicist and inventor Dr. Robert Beck, who left an archive of photographs and slides in his home when he died. The 65 slides include close up portraits of The Beatles from a press conference at the Las Vegas Sahara Hotel, photos of the band at the Beverley Hills mansion of then Capitol Records president Alan Livingston, stage shots of George Harrison with his red Rickenbacker guitar and more. It’s expected that they will be sold for £10,000-15,000 ($16,250-24,400).