I got a nice 2006 standard Jazz from a buddy of mine. Got it home and had a close look at it and the knobs on the two volume controls are different: The neck volume control knob doesn't have a set screw. So I popped off the control plate and the neck pot is different too: According to my friend he got it new out of the box and it has never been repaired. Is it possible Fender did this at the factory? The soldering looks consistent enough to be all original. I don't think it really matters, and I'm planning to try a cheap Artec preamp in it so it will all be coming out anyways, but it seems odd.