When I searched for photos of the coronet and its derivatives, I was not surprised to find out that the only images floating around are the ones I remembered from that previous thread you've mentioned.
With image sharing sites like Pinterest sometimes Calvin Trillin's quote about his mother comes to my mind "that for thirty years she served the family nothing but leftovers. The original meal has never been found."
In this case I wasn't able to find the originals either but at least three copies had a resolution high enough that a comparison made sense although none of them gave a hint where the meal originated (which I hope won't give anyone stomachache).