these old 80's strats had vintage fret wire, its small, and I have seen a lot of them that are worn and no longer playable without a refrett. It very possible
that its an esp body, that had a worn out neck, or based on the pickups in it the previous owner may have just wanted bigger frets. Its not that much money for a
decent quality USA made replacement neck so if you don't have acess to a good luthier to replace the frets then it eaiser just to replace the neck. So thats my guess.
also my cream colored one, was orginally a pearl white color like what yours looks like, it has yellowed over time,
it is still pearl white under the pickguard.