I have an '84 TSG 50, the black one with the harmonica bridge and the headstock looks very different to yours and identical to LP's from the same year... I'm thinking maybe it was a very late 84 dimple model and the dimple has been removed?
Also interesting that it has FEB, not sure if 60 model LP's from that year also had it, I don't think so, but the cherry one was the higher of the two models so maybe... or could have been a special order higher model.