I won't write too much, and let the pics do most of the talking - just a mini project really. The guitar is the one I've owned longest - bought new in about 1983/84 from Ivor Mairants in London, although from the serial number, it was made in 1980 - a Joe Pass JP20 model Ibanez, Japanese made. It's a lovely thing, from the "golden era" for Ibanez of late 70s/early 80s. The issue with this model, which I didn't understand when I bought it, is the stock humbucker pickup was placed too far towards the bridge to get a really great warm jazz tone. Joe Pass apparently asked for it like this hoping to get a more "acoustic" tone quality. He did use the model for a number of years, at least when touring, but I don't think ever really liked it that much himself. The shape was "inspired" by one of Joe's D'Aquisto arch tops - Jimmy D'Aquisto never received acknowledgement or financial recompense for this, which I believe led to him falling out with Joe for a while, though they did get back on good terms in the end.
Anyhow, it is a terrific guitar, just let down by the pickup location. I once tried a Kent Armstrong floating humbucker in the gap, and made a new pick guard (which I've now used again) for that job - it was an improvement, but I still had other guitars I liked better for jazz tone. When I saw the John Anthony Guitars slimline floating Charlie Christian style pickup though, I had to do it. So, pics!