June 4, 1968 - "A day of curious overdubs and experiments for 'Revolution 1'. John re-recorded his lead vocal during this session, opting for the 'in/out' answer to whether he should or shouldn't participate in destruction as a form of revolution....A rough mono remix of take 20 was made and was taken away on a plastic spool by John Lennon at the end of the session." --The Complete Beatles Recording Sessions
This recording is presented below. Note the extended jam (including "mama dada" backing vocals) which became the basis for "Revolution 9."