The card has an elaborate crest in its top left corner and was posted with a threepenny stamp.

BBC: Postcard puzzle solved

Brecht, whose classic works include "The Threepenny Opera, " co-written with Kurt Weil, and "Mother Courage and Her Children, " wrote the play while in exile himself in America.

WSJ: Review: 'Caucasian Chalk Circle' jabs at injustice

Well they've taken threepenny singles away.

BBC: Rocky times

And you could get threepenny singles.

BBC: Rocky times