Looks great!
I think it might be a standard J-bass body. Hard to say from the pictures, the JP90 is narrowed a good bit across the bouts vs the J-bass body.
It is really easy to see it in form fit case for a standard J bass. Fender never made a case for the JP90. They were sold new without a case or bag. I bought mine new in 1993.
Your serial is probably 1992. Mine is N013… and all stamped 1993 inside.
Hmm... I bought my JP90 new in the early 90s for $399 and it came with a case.
