I have played this axe for the last fifteen years. A Fender Jazz Five string, Cobalt blue serial no.002037. An early five string from the fender company with three way on board pre-amp switch. Anyone have a similar one out there. The B string is a problem past the 5th fret. Due mainly to the rather problrmatic location of the tuning key. But hey it is a great sounding bass. Amazing punch on the mid range.