Hi, guys! Does anyone remember the model name/number of the Seymour Duncan bass pickups with the three micro-switches on them? They had Seymour Duncan written on one side of the front of the pickup cover, and on the other side had the three micro-switches for some sort of equalization purpose. I remember seeing a lot of these pickups in the late 80s and early 90s, but I can't remember the model. Anyone?