It's possible that it was a one-off upgrade from the Custom Shop, for someone who wanted a bolt-neck rather than a set-neck (WM). But I've never seen a trussrod cover like that.
The abalone is over-the-top. I seriously doubt someone would "upgrade" the logo like that!!
What leads me to believe it's the Real Thing? Count the frets.

Is it worth gazillions of $$$? Oh, HECK no.

It's still a BT, albeit a rather cool one. Maybe $500, tops.