Joe Shuster's iconic Action Comics #1 from 1938. This cover has been burned into culture and marked the beginning of the Golden Age of comics. I couldn't picture Superman without seeing this image or Christopher Reeve catching Margo Kidder.
These are wonderful handcrafted, three dimensional paper letters made from vintage paper, book pages and recycled card. All the letters are made from original vintage Beano ,Superman or Bunty comic pages, magazines, music, book pages etc. (never photocopies).