I bought this set of EMGs from a local musician. He says they're from a Steinberger and having seen shots of his gear, I highly doubt he means an imported one. The humbucker sized ones are an 89 and 89R. It's the single-coil sized pickup having JB on the bottom that confuses me. I would otherwise expect it to be an SA as that's basically what an 89 is (a EMG that splits into two 89 pickups).