Lovely bike! Tiny weird pet peeve of mine: that's not a mixte. It's a step-through frame, and while a mixte is a type of step-through frame, there's a difference. On a mixte the top tube of the traditional diamond frame is replaced with a pair of smaller tubes running from the top of the head tube all the way back to the rear axle.http://themixtegallery.wordpress.com/
ah, good to know the distinction. Nice site!