Saw those too. Both of them beautiful!
Speaking of EB-3s.
In the 27 years that Gibson made them there were many different versions.
(Headstock shapes, mudbucker position, shape of the horns, controls layout etc.)
Which ones would be most desirable?
early sixties to 1967: classic Jack Bruce tone and look
late sixties/slothead: mudbuckermoooomphmania beckons
early seventies: mudbucker moves to middle position, maple neck introduced, body thicker, models prevalent on ebay, but not popular with collectors
73/74 to end of the line 1978: three post bridge and somewhere in that time span the mudbucker seems to have been revisited for greater clarity as well. I've never heard a late EB-3 so I cannot say whether it sounds different to its early seventies maple neck & muddie in the middle siblings or not.
I know that together with I think Scott I'm pretty much a hopeless minority here in waving the seventies flag for EB-3s.