A greeting card with cutout panel containing hand-engraved diagram of 80 consecutive radio signals from pulsar CP1919*, used in Peter Saville’s design for the 1979 album Unknown Pleasures by Joy Division.
(Black card, engraved frosted acrylic sheet; 105x148mm)
* (now known as PSR B1919+21, or the more accurate PSR J1921+2153)