Noir De Carmes set a fruit quite a while before the others. I think I saw it last Wednesday or Thursday, but it was already a decent size (so, it must have set a while ago). Here's a picture from last week.
I'm only growing about ten kinds of muskmelons, this year (including Armenian cucumbers). One of my Metki Dark Green Serpent melons has a fruit, too, actually, but I think it's younger.