I am curious about my guitar. I purchased this guitar in the mid 80s from a dealer in New Mexico. I can't find a serial number on it and haven't seen a guitar with the same type of control knob, input configuration. I replaced the original humbucker on it quite a while back with a Seymour Duncan invader and it sounds really mean and plays fantastic. Any tips on where I could look for identifying marks or other ideas on how to ID this instrument? Thanks for your help!