Can you tell us about the tremolo on the Money guitar? I've heard some people say it was a gate with some kind of pulse waveform (sidechain) or maybe an EMS Synthi Hi-Fli unit?
Similarly, do you have any recollection of how the "underwater" vocal effect was created on Octopus's Garden (under the guitar solo)?
Money guitar was a Kepex noise gate modulated with an external sine wave generator.
On Octopus's garden I remember they tried to figure out a way of actually putting the vocal track underwater but they failed. It was pre noise gates so assume it must have been a trem unit on a guitar amp, but my memory is hazy on that one.