These guitars were made in Japan at the Fujigen factory from 1975-1979. The body wood was made from Japanese “Sen” and referred to as “Sen Ash.” However, Eddie Van Halen and Chris Holmes both originally thought they were made of korina due to the advertisements Ibanez used, but “Korina” was just the name of the finish. It features an epoxy finish which easily chipped, and most of these guitars you see today show extreme chipping over the years.
The pickups were Maxon “Super 70s” and featured “Star” tuners. Ed would eventually replace the tone/volume knobs with ones from his stratocaster. The guitar features generally characteristics of a Gibson Explorer: Set neck construction, 22 frets, fixed bridge, etc.
Something very rare about Ed’s destroyer is the neck joint. Ed’s destoyer was an extremely early version with bulkier set neck joint when compared to later 1975 versions.
More general information found at Ibanez Fandom.