on the jdm market the first nx was a ga15ds in 1990,
which became the ga16ds in 1991 and from 1993 it
became the ga16de.
there was also an nx-sr with first the sr18de (or the ca18de)
which later became the sr20de.
In europe we received in 1991 the 100nx ga16ds and from 1993
on, the ga16de, and the 100nx gti sr20de.
But the european models don't have a vlsd with the sr20de.
In the states you guys only got the ga16de and the sr20de
with the vlsd.
you can look at www.carview.co.jp
and do a search for the nx, then you'll see the same info
as i wrote above.