Just spotted these two MMs on eBay.
Both are authenicated but in both cases the Marilyn looks a bit odd. I'd say genuine all the same - others agree?
If I had $15k hanging around doing nothing I'd be tempted by this one - very nice image and context. I'm more convinced of this one, partly due to the "To" in the inscription.
I attach jpgs for enlargement purposes
I don't know how but I was not aware of this excellent blog until today:
I think the author (Pauline) is a member here.
The blog doesn't go into the specific points discussed above but it is an excellent reference source. Quite a labour of love!
this is a great source of reference and I use it.
And it shows most examples of how she constructs her M's fairly consistent