I always snap DUX frames up when I come across them as they are so well made and comfortable. DUX were an extremely well regarded Swedish midcentury furniture manufacturer who also had great success in Denmark and the USA.
Ebba has an understated elegance and clean laid back styling which I love. The frame has a sprung front, (where the whole front edge under the seat cushion is a sprung unit) and a generous seat depth which makes it lovely and loungy, this piece is dangerously comfy.