It may not look like much from the outside, particularly on a black-and-white postcard, but it seats 2,800, and the interior looks pretty fabulous. I have never been to La Scala, but if I did I would want to sit in the cheaper nosebleed seats (known as the loggione) above the box seats. If you sit there, I imagine you can watch the opera and all the people in the box seats too.
La Scala was severely damaged by bombing in 1943, but was rebuilt in 1946. The opera house is currently facing a tough budget year, with a drop in both private and public contributions.
Here's the back of the card.