If there was one supermodel in the 1980s that I always saw that I thought looked like a Nagel, no translation needed, it was Eva Voorhees.
There are several Nagel illustrations and paintings where I very much see Eva, particularly some with voluminous, curly hair. (No one could do big hair better, and have it still be classy, than Eva.)
Looking at Eva, to me, is like looking at the woman who is gazing out at me from the Palm Springs Life painting.
When combined with the note that the estate once made a comment about a piece with a veil that amounted to saying Nagel was looking at Italian Vogue, and, well, just getting inspired by Vogue, which often had Eva on the cover, and it all makes sense.
Then, today, I found this and it cannot, to me, be a coinsidence.
Also, in the drawing for this piece, the model does not have hair cascading down below her cheek; It is like the photograph.