hey, erm.... this is the lil' secret that i didn't wanna share but!! since it looks as if i am the only nuno fanatic here, i might reveal =)
gingataff - washburn n4 made in the year 1990(pre-production)-1991 is the real deal. It was made and set-up by stephen... someone :P who originally built nuno's axe. Difference is that they are hand made original, and washburn had not much to do with it production since it was built in stephen's own workshop. all the parts and woods were carefully selected unlike recent ones built by washburn. there are only less than 200 exsist made by him, hence it certainly has sentimental value to me. as you have noticed, they have used kahler bridge, the shape of electric routing is different, etc etc one more secret?? only few 1991 model has a single cutaway body which apparently is 'the' nuno guitar. they are valued around $2500-$3000...
Antag, mecca777 thanks for your tip! i am still having a doubt about getting it but if it stays under $700 i might take a risk..