Hi Cluggs,
Welcome to GbL. When the Stingray evolved into the G&L F-100 in 1980, the headstock decals had "Series I" if the fret board radius was 12", and "Series II" if the radius was 7.5". I believe that the names "Stingray I" and Stingray II" were the same idea, i.e., just to identify what the fret board radius was. Other than that, they would have been the same instrument.
Ken
Last edited by KenC on Sun Feb 08, 2015 3:45 pm, edited 1 time in total.