I can't believe it never hot me before, but look at this pic f Jaco. That is one beat up bass. It's more than wear. It looks like it's been abused, tossed about, treated sloppily and pretty much thrown around without care. YET....the neck is perfect. Why is that? Look at the headstock -- brand new, glossy and without a mark on it. How does one destroy one part of a bass and the other remains pristine? My guess -- that was a replacement neck. Now I'm not a fanatical Jaco authority so maybe this has been addressed or someone knows more about it. But by what this picture reveals, I can't believe that is a stock instrument. Whattaya think?