They include the 1964 arrival of George Harrison’s 1963 Rickenbacker 360/12 12-string in time for the album A Hard Day’s Night, Lennon and Harrison’s acquisition of Fender Stratocasters for Help!, and their subsequent purchase of Epiphone Casinos in 1966.
Their history is full of consequential moments when new gear brought fresh sounds into the band’s music.
The Beatles’ various eras are defined as much by musical styles as by clothing and hair fashions, and they are specified by musical equipment.