It was commonplace to dye streaky ebony in the old days -- a solid black fretboard was deemed to be more aesthetically attractive.
It was also commonplace to dye lighter woods, like rosewood, so they would look like ebony.
I think the latter is what's going on with your guitar, as the exposed areas aren't streaky at all, as ebony would be, but rather appear to be consistent in color and grain.
There's no longer a tendency to dye fretboards, as companies (like Taylor, and others) began letting the streaks show.