I think it's an '83 because of the narrow truss rods cover and the black finish (looks like they did a batch of them)
It could be from '82 (or maybe even '81?) but I think all Spoilers (first +/-100) all had the solid Koa wings, this batch was still running in '83. (not sure if they did other woods/finishes in between)
There was a black '83 for sale @ the LowEnd a while ago, it had some headstock finish damage (it had damaged finish all over it)
So it was a possible match I thought...
There was no ownership mentioned so it would be a wild guess.
Just after I decided to buy, it sold for $1500 :-(
She's still on the site:
LowEnd 83 Alembic Spoiler 4 Black Also interesting:
New Alembic Player :-) (same bass)
Keep looking for those old Black Spoilers, you'll never know ;-)