All this history reminds me that about 15 years ago I bought a Cattleya luddemaniana from a professional and paid as a botanical Cattleya. When it bloomed for the first time I realized that it was not what I thought it was.The real cattleya luddemaniana has small wings at the top of the column (winged column). Cattleya gravesiana does not have this particularity. See The large flowered Cattleya Species A.A.Chadwick page 80.
Thanks Brabanita, this clone doesn’t have a winged column.
I‘ve tried to catch the glistening texture of the petals that Leslie mentioned, in this photo.
It isn’t easy but you can’t see some of it on the top edge of the extreme left petal.