I have a 1979 Fender Precision and want to know if the neck is genuine to the body. I have popped the neck and the only number is the serial number (1979) on the headstock. Unfortunately this does not match the one on the pickguard (1979 too!). So, I don't know if the neck is new to the body or it is just that the pickguard was replaced at some point. Is there any other clues that the neck might be from another bass.