The Beatles were first introduced to the Martin acoustic guitar
in Hamburg in 1961, where they got to know fellow artist Tony
Sheridan. Sheridan then played a Martin D-28E acoustic.
It would take several years before the Beatles acquired their
own Martin guitars, however. Lennon bought his Martin D-28
in 1967 and McCartney also got one later on.
Both Lennon and McCartney used their Martin D-28 guitars extensively
during the White Album sessions. Lennon used his on the recording
of I Will and later on Across The Universe. McCartney played
his D-28 on tracks such as Blackbird, Rocky Racoon and Two
Of Us. He presumably held it upside down since he was left-handed.
