Hi
I own one of these rarities. Mine seems to be older since it doesn't show that "performer series" legend and has lots of signs of wear. They are Korean made and were produced in late 80's and early 90's. Mine has no S/N.
I used to have the name of this particular model, but somehow I can't find it now.
I bought it because I like it a lot since the first time I saw this tiny buddy. Some years later, after it passed from hand to hand, finally it was available for me. When I saw it again, I was about to cry!!
Layers of dust hiding its colors, strings were orange-brown rusted, neck too bowed, two knobs were missing, screws were very very rusted or missing...it was a mess. The hard case was in similar conditions.
I took every single piece apart, cleaned everything, bought knobs, changed pots, adjusted neck, got all the pups' screws, a set of new double-ball strings, got lemmon oil for the fretboard, weld everything again, and took it to life and to stage again.
Sound is great, and I am very happy for all the time and money invested, it was really woth it.
Hope you can find some more information, if so, I'd be glad if you can share it with me.