Both Black Beauty photos (regular & Tetra) looks the same. The original would not/could not set seed (sterile), but I think it was Robert Griesbach took and made a tetra. I think, (not sure) when they make a tetra out of an original the flower is larger, but they look the same. The bulb is a lot larger.
He is a photo of a tetra Lily bulbs. Its on a sheet 8-1/2 x 11"