While leafing through some sheet music I had bought at an estate sale, I stumbled upon a weird precursor to the thirty-second track preview. On the inside front cover: 6-7 bar ‘previews’ of other sheet music offerings! Now that I’ve seen it, this is the obvious way for sheet music publishers to advertise their other offerings, but it never occurred to me that this was done.

Precursor to 30-second Amazon preview?