Concert promotion has always been a printing problem: how do you fill a room before anyone has heard the music? For most of the 20th century, the answer was a poster, and the best ones had to work as hard as any advertisement, conveying mood and urgency from a telephone pole or a record shop window. The period when that pressure produced the most interesting results runs roughly from the 1940s through the 1980s, when screen printing and offset lithography gave designers real tools. The pieces shown here are period originals from that tradition.