Zero Fret standardized. Stereo model's pickups moved to normal positions. Simplified stereo wiring. Three tone switches on upper bout. Single mute added.
Earliest versions dial up, later flip up type with simpler knob.
Padded back deleted and muffler dropped. Recessed edge aluminum knobs. Stereo option dropped. Truss rod adjustment moved to neck heel. 7577 Antique maple finish offered.