Normal precision pickups are arranged with the bass side neckward and the treble side bridgeward (I just made up these words, I think). I've seen some models that are reversed, with the treble closer to the neck and the bass toward the bridge. I was watching an old Night Ranger video earlier and Jack Blades had one of each on his bass. What's the tonal difference or, if there's none, is it just aesthetic or maybe an end-run around a patent? I'll try to get some pics up later.