I believe - and I could be both mistaken or this could be a case of Gibson doing whatever whenever - that regular old sunburst EB2s 1964 through 67 had Gold with chrome inserts. If cherry, they got black. I haven't paid attention for Sparkling burgundy. If there was a non-standard finish, like the odd natural, black, or Pelham Blue, they got gold knobs, and if they ever did a white one it would have got black knobs. I think they always said TONE, and there may have been both VOLUME and VOL variants, but again I can't recall too well on the latter. Jules will probably know. I also believe Epis did the exact same. I think Gold with gold insert may have been reserved for fancy pants stuff like ES-355s with gold hardware, but if they needed a couple and they were in the box, they probably used them on a sunburst here and there.
The earlier ones - 57ish through 61 used bell knobs, amber for Sunburst, natural and black knobs for Cherry for the few they made at the end. They did make some black ones in 60-61 and I think they had gold bells, but I have only seen one legit one.
