Zvukovye Pis'ma - Musical Mail

Zvukovye Pis'ma - Musical Mail. "...The Institute acquired a small collection of extraordinary Russian sound documents: zvukovye pis'ma, or musical letters.
They were issued around 1950 in the Soviet Union. The musical letter is a bifold picture postcard with a supplementary sheet and a small flexible disc glued onto it. A topical song, either from the Soviet classical repertoire such as the 'Song of World Youth' and the 'Song of World Peace', or a love song can be heard.
Its text is printed on the postcard together with a picture of the composer or performer of the song. There is also space for a short message to the recipient."