I bought as near as I can tell a '75 Fender Jazz. The previous owner bought it used in '80 and thought it was a '78. When I bought it, it had been in a closet in it's case for several years. Prior to actually buying it I was allowed to go ahead and pick it up to take it with me to Oklahoma to my uncles for Thanksgiving. We tore it down, gave it a good cleaning. restrung it, and put it back together. The neck code says the neck was made in Oct. '74. All the other parts that could be dated were pre '75. The only marks on the body were in the neck pocket which looked like a bleed off of the inspection stamp on the neck. Pups are centered at 4 inches which according to Fender started in '75, but I am finding out happened on previous years too. Other than that the only thing on this bass that says '75 is the serial number on the neck plate. Short of tearing this thing back down again which I can do, is there anyway of dating it? Or should I just go on figuring it was a transition year clean the assembly line up build. I have no intentions of ever getting rid of this bass. Just one of those curiosity things.