The film shows the Fabs backstage at the ABC Theater in Blackpool in 1963 and is up for auction with more than 100 rare photos of the Beatles shot by a photographer Eve Bowan during the group's first American visit in February 1964. The Daily Mirror story linked above mistakenly dates them from 1965.
The 109 original negatives are valued at £12,000 while the colour footage is estimated at £9,000.You can see Ewbank's auction lots here.
Both lots were acquired by Mark Hayward, a well-known Beatles collector, who is now selling them at Ewbank's Auctioneers of Woking, Surrey.
Alistair McCrea, of Ewbank's, said: "The film footage is the earliest known colour footage of the Beatles. There might be some earlier film still stuffed in someone's drawer but we don't know of any earlier colour footage than this."