Just a little addition to the Mellotron post/comments (and a slightly unusual then & now shot); being fortunate enough to attend a session at Abbey Road a while back, I was shown some of the microphones that remain there from the '60s (ie those not sold/chucked in a skip/etc).
Off the top of my head, I'd say these are AKG D19cs (I jest - I identified them with the help of the weighty Recording The Beatles tome, a veritable pornucopia (if you will) of vintage gear).
The mics are kept in a little room off the corridor running outside Studio 2, and staff assured me that these very ones were used on many Beatles recordings. An example of the AKG D19c in situ can be seen in the photo of John getting wiggy on Richie's traps during the AYNIL rehearsal.
