Besides 'Afternoon Delight' Ernst also introduced 'Competitive Edge' and 'Different World' which look very similar. And there are a few others in this color combo. This photo gives too little detail to narrow it down.

Part of the ID difficulty is color aging (fade). I would take close up photos from the time the bloom opens to when it shrivels. And also of the stalk for bud placement and branching. Note if there any double or triple bud sockets and location of them. Even then this one will be tough.

Thank you for your efforts, Iris Gal, I appreciate it. The only helpful information might be is that it is at least 15+years old.

Thank you also for the other identifying details that you mentioned. I will try this request for ID again next year when I can take better pictures. :-)
Jo

Here is my Afternoon Delight