He wasn't technically missing any fingers, but he acidentally had the ends cut off of the middle two figers on his fretting hand. (The right one in his case, since he's a damned lefty)Ozzys Guitarist from the old days had half of a finger missing. I believe one of his frett fingers too.
To this day he plays guitar with little leather caps on the tips of those fingers.
...and he also had to use light strings and tune down...it's probably why Sabbath would play in tunings as low as C#, thus starting the whole trend of heavy bands tuning way low. (Which really didn't reach its fruition until the '90's...)
-S.
