Re: Fender Kurt Cobain Jaguar vs Classic Player HH Jaguar
The reason for the closer vibrato placement is a greater break angle over the strings. In theory that is meant to do two things: Add sustain/eliminate some of the surfy 'plink' to the attack and decay, and keep the strings planted more solidly in the bridge slots. That said, I never had the string-jumping problem with any of my Jaguars/Jazzmasters, using stock bridges and strings between 9s & 11s but some people do. The closer placement also affects behind bridge harmonics.
I'd say perhaps the tone is a bit brighter than it would be otherwise but it isn't a game changer or deal breaker for me. The screw in arm is an asset as the press-in arms in even AVRI vibratos can tend to be a bit loose. From my experience the Classic Player vibratos are good quality.
I think the consensus is Kurt's Jaguar headstock was modded at some point; it's a '65 bound/dot neck, and even the very first Jaguars had a slightly larger headstock than a Strat. So it is probable someone altered the headstock and decal at some point. Good luck on your search, I do think the Mexican Jaguars are great guitars.