The "G" is for graphite rods in the neck, the "F" is for fretless. This bass was custom ordered 1997. It has a mahogany core with figured walnut top and back, ebony fingerboard with lines, matching walnut headstock, standard ken smith pickups and electronics. It has the earlier body shape with two small horns instead of the longer lower horn. Minor signs of use. Excellent condition. Weighs in at 11 pounds.