fender pentastar emblem.

I think they changed somewhere around 1967 from the early all metal pentastar to the plastic based one. The early appears to be gold anodized aluminum with a self-tapping stud and nut (so it bolted on) and the later one has a plastic base with an aluminum cap glued on top that you pushed into the hole where it clipped into place. I've seen both silver and gold finishes on the later one. Never seen a steel pentastar....