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Gibson J-45 Special Ebony Guitar. What kind of wood?

I have a Gibson J-45 Special Ebony Guitar and I am trying to find out what kind of wood was used to make it. On Wikipedia it says that J-45 Gibson guitars were made with spruce for the top and mahogany for the back on sides but would that be conclusive for all guitars made?

As far as I can tell it has a spruce top and mahogany back and sides. Puzzlingly, it also has a rosewood fretboard so apparently for this guitar “ebony” refers only to the black finish with the white pickguard.

I found the specs for it here:

http://www.rainbowguitars.com/guitar/gibson/1968-j-45-ebony-limited-edition/SPLMON01/GB

J-45 Gibson VOL#9