So this is from 1980-1981, probably 1981. It looks like a PAF in the neck position (the picture is not detailed enough to look directily at the pole pieces, but they seem to reflect light a little bit differently, so I'm going to take a guess here and say that it's a PAF and not a Super Distortion in the neck, which would then indicate the possibilty of him recording NOTB with a PAF neck pickup in his Kossoff Strat).
This is the tremolo system he used for a couple of months early during the World Slavery Tour, it's a Rockinger Tru Tune Tremolo.
Adrian Smith also had that tremolo system installed on his two Lado's (now refitted with Floyd Rose Bridges)