Most of these are from the 50s. It's easy to date them because sheet music has a copyright date on every page. Some of these are even before 1920! I did end up buying most of them, I just couldn't help myself, they were sooooo pretty! As a result of this book sale, I'm actually going to start collecting vintage sheet music. Because they're excellent examples of illustration and typography from different eras — not just because they look pretty! That would be shallow.