I'll also go with Etihad #5, MSN191. Are there also any other Emirates frames planned which are still in the old configuration? There might be different timings for the 2-class configuration and the other, let's say traditional LR and ULR configurations.
I had some idea of 2 different sequences for Emirates in the back of my mind, but didn't dare to go out of sequence . This plane is some kind of HoV. So for Emirates we might have kind of two "threads" of MSNs.