Could very well be an earlier JD cue, point length looks correct for his cues, butt receptacle for the bumper looks right , too. Joint pin varies a bit, but is also very close to what he does now, and he does in fact mimic 70's style designs- propellers, diamonds, notched diamond patterns, etc. Cue butts are usually lighter in weight than other custom cues, shaft diameters are usually a bit thicker, he uses short ferrules today.Possible, not definite from these photos.