Wav, I don't think the J stands for junior. If memory serves me correctly, when SGJ and LPJ were selling in current production, they had also had the 22 fret faded Specials. I am sure the J had a meaning and as we know along with it, came 2 more frets. no pick guard, and were reputed to be extraordinary players. Then they got even more desirable when Gib started blowing them out for about $400-$600 if memory serves me right. I seem to remember the SGJ’s had 490’s and also 61 Zebra pickups at some point.