I think it's too early for this question. The Hampstead is available only a few weeks, so you can't find one with patine, I think.
I own the Hampstead PM in Azur, but the vacchetta is very clear.
That's right! I have the MM and I got it the day it was released, which is less than 2 months ago..It will take some time to get some nice patina on that bag...
In addition, I'm not interested in getting a dark patina on this bag, I will try to keep it as light as possible, don't think dark patina will go very well with this light canvas...