Got this from "Paperback Writer Beatle Music History":
It was indeed Paul playing lead guitar which leaves the bass guitar work to George Harrison, since this rhythm track did not have any overdubs at this time. Adding to this conclusion are photos of the session on this day which shows George playing another new instrument to The Beatles line-up, a Burns Nu-Sonic bass guitar. John’s Gretsch electric guitar was apparently never used again by the group after this day. George, however, appears to have used this short-scale Burns bass guitar a couple more times during the “Revolver” sessions.
Probably George just wanted to try out something new and picked that instrument.
One of the most interesting famous guitars of the late 60's was Syd Barrett of Pink Floyd's 1962 Fender Esquire guitar.
He had put shiny silver film on the body and added silver metal disks that he would buff to a shine before every performance to reflect the light from the shows out into the auidance. A couple of my friends have made nice replicas of this guitar.
The sad thing was Syd accidently left the guitar out on his porch one night while it rained and all the disks rusted and he soon lost interest in the guitar and traded it for a new black telecaster which he later hated! No one knows where the guitar is today.
Nick Mason commissioned a set of custom copies of Syd's Esquire, and gave them as gifts to band members.
I am now doing research on a Jimi Hendrix guitar that he first got when he got out of the service in 1962. It was a 60's Ibanez Jet King guitar and he found it at a Music store in Clarksville Tn.
A couple of pictures of Jimi with the guitar.
This is what the guitar looked like (this is a reissue and has diff. style fret markers)
What is really interesting is Jimi got the guitar on loan from the shop and couldn't make the payments on it so he returned the guitar to the shop where it sat for years. Finally when Jimi became famous the shop owner had put it on display hanging it on the wall in a prominate spot in the store. It hung there for 30 years until a tornado hit the city of Clarksville in 1999 and the guitar went missing. The shop owner died in 2015 never finding the guitar. The shop is gone now and a bank is now in its spot.