Never-before released photos of The Beatles taken by photographer Mike Mitchell are now on sale at Christie's auction house.

The collection, titled The Beatles Illuminated: The Discovered Works of Mike Mitchell, features almost 50 unpublished images from The Beatles' first appearance in the United States. Mitchell was just 18 years old when he was given access to the band's arrival in America and their first U.S. gig at the Washington Coliseum on February 11th, 1964.

Christie's is selling the stunning black and white photos individually, and is expecting to garner over $100,000 for the whole lot.

The Beatles arrived in Washington just two days after the famous Ed Sullivan appearance catapulted the band into the American consciousness and music history.

The images show the British pop band at a press conference and playing the Washington Coliseum. Aside from the artistry of the photos, the biggest impression one gets from the images is one of joy.

The Beatles were clearly delighted and having a great time on stage, sharing all of the enthusiasm of the crowd. Here they were, performing in America, the land of their musical heroes and cultural icons, the home of Elvis and Chuck Berry - who's Roll Over Beethoven was chosen by the Beatles to begin the show - and Little Richard, who's Long Tall Sally was chosen to end it, Christie's stated.

The auction will start on July 20 at Christie's New York store. The photos can be viewed at the auction house's Rockefeller Plaza location between now and 7pm on the day of the auction.

Two of Mitchell's photographs can be seen below. For more, visit Christie's electronic catalogue.

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