The headstock speaks for its origins indeed going back to a Bicentennial. Too large for a post-1987 model, you couldn't squeeze five tuners on that. Also the back of the headstock evidences that four large tuners were mounted once, Bicentennial style.
I can't make up my mind from the pics whether the back shows a belly bevelling on the upper wing or not - if not then ----> Bicentennial, only those lacked these.
But it really doesn't matter. You have to buy this bass for what it is now, not for what it was once.
Personally, I think it looks horrible the way they have now obscured the trademark TBird center block with that godawful flamed maple, brrrrrr ...
Ironically, I have a 5-string LPB-2 with the same flamed maple look strung to a high C too. It sounds better in theory than in practice, the C string already sounds very geetardish, so it's more of a 4+1 solution.