Well after all the years I have played fender I only ever thought about the obvious models and headstock. Then I read how guys was saying there was a difference in P and J Heads and I was puzzeled because I cannot see a difference apart from what you see when different finishers drum sand! Some of mine have less downward point near the nut. One maybe a little more rounded. However back in the 60's we used to sit around passing Fenders around Les Paul as well. Just arguing over quality and finish. Apart from my 53 P bass my jazz and later P Bass seem to be the same! The riverband.demo link shows heads but mainly its the tuners that are different!You're welcome. It's been awhile since we've had a nice headstock thread here.