@Zurie I don't know if Heritage
ever contacted the buyer. Jack and I both contacted them about it a while ago. Jack has a direct contact there I think. Jack also contacted Stack's but they said it was too long ago and they didn't have any info. Heritage
still has it listed as "make offer to owner" but they probably aren't aware yet that the cert has been pulled. I can imagine that there's little incentive for PCGS
or HA to put a lot of effort into tracking down the owner, as it would cost them money.
Unfortunately it's in the slab style with the coin sealed in all the way around the rim, so I don't think you can see the edge through those. If the owner cracked it out to investigate, that would invalidate their guarantee, right? Of course the auction images prove that it was in their slab.