OK. So I think the Bass was made 2003/4. I've no idea what the pre amp is. It's a 3 way treble , mid , bass and is 18v as there are 2 batteries ( which seem to last a good while) There's trim pot , not sure if that's a gain or a sweepable mid. Looks like some sort of custom pre amp, perhaps someone on the forum would know.
Pickups are ;Bassline 6 which I believe are now Seymour Duncan
String spacing is 18-19mm I'd say, roughly what a standard fender precision is or just under.
weight? no idea, I'll have to get some scales. It's 'normal' for a 6 string, through neck, hardwood bass, like my Ken smith custom 6 for example. They're heavy, it goes with the territory IMHO a bit like my 70's Les Pauls
I'll try get a proper weight measurement
Here's the pics, hope that helps.
M