In case it helps he said that he's had it sitting on the wall of his garage for about 15 years or so so that might help date it.
Also, as a side note, this thing is super messed up. The pickup closest to the bridge doesn't work and the truss rod is loose or broken (turns freely) so the bottom eight frets are unusable because the neck is a bit bent. But it's great for a beginner like me to practice on! :D Hell, I could've held off on buying the brand new Jackson I impulse bought when he told me he couldn't repair it lol