That's the blue 160th, right? It looks more like black in this pic. 😎
Many of us were/are just as ignorant. As an old timer, I too had always thought this case was a newer design made for the early 2000 Monza remakes. It wasn't until only very recently that I learned the case has been around since the 1930s. That's why I find it amusing when CEO Frederic calls the case "avant-garde".
Yes, it is also explained in the diptych that came inside the box of the Monza 40th anniversary 👍