http://www.youtube.com/watch?v=uRhZISswW_k
John Birch, methinks.
Birch yep, and see this thread:
http://bassoutpost.com/index.php?topic=3554.0 (http://bassoutpost.com/index.php?topic=3554.0)
More info about Geezer's basses from the seventies.
When Ozzy could still sing, even live. Glenn Hughes once said: "People make fun of Ozzy because he has this monotone voice giving each word equal doom-laden emphasis, but in fact it's hard as hell to sing like him. I couldn't do it and I tried."
It's true. Something about his style makes it not entirely noticeable, but Ozzy has a fairly high singing voice.