I notice I didn't mention another special feature of this bass - the cone headstock is a bit unusual. You can see it in the 3rd picture from the top.
It's not the current cone shape, which is wide at the bottom and also fairly wide at the top. It's not the shape found on early Spoilers either, which was narrower at the bottom. And it's definitely not the oversized pointy cone used on John Entwhistle's Exploiters. - It's pretty much the current shape, but with about 1/8 shaved off on either sides. This means that the point of the cone is not wide enough for the logo, so they've put that immediately above the nut.
Not sure if this was just a happy accident - it looks real nice - but it wasn't recorded on the buildsheet. I have a 1988 inspection slip signed by EVH (not Edward van Halen) in his capacity as Wils employee - no mention of the custom shape there either.
I'll try to post a picture later (like in two years time LOL).