Badass, they are kind of filters open close neutral, called character switches, they take you from John Entwistle late 70s 80s to Stanley Clarke Mark King. The knobs are volume and tone for each pickup. There still information on the web on the circuits. Stu
FlatEric, it is clear that your wonderful collection is entirely incomplete without this bass Stu
Isabass, I currently lack the means to weigh the bass, but its medium weight, not heavy or light, I will get it weighed and get back to you Stu