by JimN » 08 Jul 2012, 16:25
CBS-era Fender guitars (and basses) with the three-bolt, shield-shaped neck-plate were so designed because of the neck tilt mechanism. At the time, Stratocasters (all of them), Telecasters (only some models) and Jazz Basses were fitted with the system.
Burns guitars (particularly the Marvin) were constructed with a neck-tilt device from the mid-60s onward (still with four neck-fixing bolts). Fender picked up the idea later.
When Fender introduced the Vintage Reissue range in 1982, the three-bolt neck-plate and neck-tilt went out of the window, though they were later brought back in the various contemporary ranges (which have been given a number of different model names over the years).
Similarly, the headstock-end truss-rod adjustment (the "bullet", used on Strats, some Telecasters and the Jazz bass) was dropped in 1982, to be replaced by a blanked-off aperture (like 1950s Strats), but it was was later reintroduced for the standard range(s). I think it looks hideous to have a hole in the headstock of a Fender (adjacent to the nut), whether it consists of a chrome bullet or a more discreet opening for an allen key. Adjusting by having to remove the neck from the body is less convenient, but the headstock just looks better, that is all.
JN