These were two different custom orders. The backs are angled to match the angle of Nitto front racks, so that the tongue of the rack can help support the bag without the need for an additional decaleur. The blue one was enormous! The green one is celery and navy, and you can see it on its matching Rivendell here.
They both have cuesheet windows on the top; for reference, the viewable area is about the same between the two of them, believe it or not.