indeed JMJ used Nord Lead 1 on Oxygene 7-13 tour.
I remember at the concert I attended (Milan, 1997) a break when JMJ talked about virtual anoalogs and showed to all us on the Nord Lead: for sure the main melody sound of Oxygene 4 (at least I'm sure to remember that one)
and perhaps some Eminent type of sounds of Oxygene 7-13 tracks.
Could be Oxygene 7 sound (that he performed with the laser harp) at the beginning of the concert.
Not sure now if he had a real Eminent for the string parts (as in Oxygene 13).
Could be he used Nord Lead 1 also for some bass sound during the concert.
Need to watch a video of those concert to be sure.
During recently years he brought a Supernova 2 to play on the stage.
Anyway also an Access Virus B is an excellent synth for reproduncing JMJ's sounds...
just take a listen to Per Kristian's covers (they are amazing close to the originals).
(I have both synths indeed now