I know there's been plenty of discussion about this fabulous bass sound, first of all it was thought to be Brian Odgers, then Herbie Flowers on a Jazz then finally Dave Richmond supposedly on a Burns Bison (although he can't seem to remember much about it and he's only really been confirmed as the player on the Melody Nelson sessions).
The thing is if I just use my ears I could swear this is a Rickenbacker being played. I've tried to get this tone on a Burns and it doesn't sound the same even with a variety of palm muting, pics and pickup selections. But I'm very familiar with the Rickenbacker sound and this sounds like one.. and I suppose it's possible it could have been borrowed or loaned for the session perhaps? I could be completely wrong. Anyway just thinking aloud and wondering what others opinions are?