| Body | Fully hollow laminated maple with laminated spruce top (1962-2003) Sound posts fitted to some X-500s from mid-1980s to 2001. |
| Binding | 5- or 6-ply (1962-65), 5-ply (1966-70), 7-ply (1971-79), 9-ply (1979-2003) |
| Neck | 5-piece maple (1962-2003), squared fretboard end (1962-71, 2000-03), rounded fretboard end (1971-94) |
| Master Volume | Non-master volume (1962-71), Master volume (1972-2003) |
| Pickups | DeArmond (1962), Guild "Anti-Hum" (1963-70), Guild HB-1 (1970-94), Guild/Fender HB-1 (2000-03) |
| Tuners | Kolb (1962-65), Grover Rotomatic (1965-74, 1986-2003), Schaller M6 (1975-85) |
| Pickguard | Acrylic w/chevron and Guild logo (1962-64), Acrylic stairstep w/5-point star and Guild logo (1965-71), Acrylic stairstep w/Guild logo (1972-79, 2000-03), 5-ply stairstep (1976-94) |