What size do you think she will favor? The suggestions come in quite a range of sizes, from the fabulous and large GP to the elegant and small Lange Arkade.
I have to confess that I went to my dealer with cash in hand to buy the GP Cat's Eye and I did not care for it at all when I tried it on. I ended up purchasing a Blancpain triple date moonphase (not the current model), with MOP dial and a great automatic movement and a 100 hr power reserve. I suggest you look at all of the current Blancpain ladies models - you might see something you really like.
Ginger