Nice catch!
I also had a JSII. Great bass, but I liked it best when it had those 70s pickups in it. I had converted it to Darkstars at one point, sold the originals, and installed a big brass-mass sustain block bridge (made by Marko Urisn.. outwardly, it looked like a stock harp bridge with brass saddles). I loved the bridge, but the DSs just weren't my thing so I ended up moving it to fund other GAS.