a departure from the Lennon-McCartney partnership. The single's cover featured an x-ray image of John's head, overlaid with his distinctive round glasses.

A pair of round spectacles worn by Beatles legend John Lennon were due to be unveiled ... became part of his trademark image. The glasses, which Lennon wore when he wrote the album Imagine ...

In Imagine, John Lennon invited his audience to look ... who bought it for £1.67million two years ago. The glasses, which Lennon wore from 1970 to 1973, used to become darker in strong light.