Hello guys, I'm about to purchase a '72 Fender JazzBass. I have some questions on how the validate the authenticity of the bass. I'm pretty sure about the neck of the bass (stamped Jan72, 4bolt-connection, bigF-neckplate) and the pickguard. But I'm a bit uncertain about the body. It's been refinished (not a real problem to me), but it seems fairly lighter than my 1996 USA JazzBass. Also it doesn't have any drilled holes near the bridge to connect the bridge pickup cover (who are included). Off course these might be filled during the refin. Any information about the type of wood used and weight of this basses ? Thank You.